Quiz_Random

1. Longest known virus is:

 
 
 
 

2. The oldest book of botanical work which now exists was written by Theophrastus. Its name is:

 
 
 
 

3. Lichens are ecologically important because :

 
 
 
 

4. A plant which reproduces by spores, has vascular tissue but lacks flowers should belong to :

 
 
 
 

5. Some diseases caused by bacteria are:

 
 
 
 

6. Lichens reproduce by :

 
 
 
 

7. The pathogen that causes covered smut of Sorghum is :

 
 
 
 

8. In the life of all plant groups, the first cell of gametophytic generation is:

 
 
 
 

9. Fungi have been separated from kingdom Protista on the basis of:

 
 
 
 

10. Which of the following is a free-living anaerobic nitrogen-fixing bacteria?

 
 
 
 

11. Haplo-diplo-haplontic type triphasic life cycle occurs in:

 
 
 
 

12. Viruses are considered to be:

 
 
 
 

13. Which are non-seed-bearing vascular plants?

 
 
 
 

14. The order generally ends with:

 
 
 
 

15. If all ponds and puddles are destroyed the organism likely to be destroyed is:

 
 
 
 

16. Late blight of potato is caused by:

 
 
 
 

17. ‘Pond silk’ or ‘Water silk’ is the common name of :

 
 
 
 

18. All algae have:

 
 
 
 

19. The sporangia of Selaginella are attached:

 
 
 
 

20. Which of the following is the most destructive enemies of mankind?

 
 
 
 

21. A characteristic spore of Agaricus, a mushroom is known as:

 
 
 
 

22. At the time of germination of zygospore in Spirogyra:

 
 
 
 

23. Extremely reduced gametophyte in plant kingdom is:

 
 
 
 

24. In Cycas microsporangia are borne on:

 
 
 
 

25. The bacterial decomposition of nitrogenous organic compounds in the absence of abundant oxygen usually results in the formation of substances of offensive odor, chiefly sulfur compounds. Such anaerobic decomposition is called:

 
 
 
 

26. How a fern differs from a moss?

 
 
 
 

27. Fire resistant fibres and plastic are obtained from the alginates present in the cell wall of which algae?

 
 
 
 

28. Non-porous wood for furniture is produced by:

 
 
 
 

29. Pinus gerardiana is :

 
 
 
 

30. Parthenium hysterophorus is a native of South America but it grows luxuriantly in most of the area of India. In India, it is considered as:

 
 
 
 

31. Which one of the following statement is wrong?

 
 
 
 

32. The developing embryo in Selaginella derives its food from:

 
 
 
 

33. Select the wrong statement:

 
 
 
 

34. Antibiotics cure the disease by:

 
 
 
 

35. The male cone of Cycas is made up of a group of :

 
 
 
 

36. The tallest moss in the world is :

 
 
 
 

37. Which among the following is known as Father of Indian phycology?

 
 
 
 

38. Which of the following causes smut disease in cultivated plants?

 
 
 
 

39. Interferon is a:

 
 
 
 

40. Lichens show :

 
 
 
 

41. Helotism word is used for the symbiosis between :

 
 
 
 

42. Embryophyta includes :

 
 
 
 

43. Antibiotic has been extracted from :

 
 
 
 

44. If the sporangia in a sorus are in the same stage of development it is called:

 
 
 
 

45. Yeast is different from Rhizopus and Penicillium in being:

 
 
 
 

46. The chief characteristic of class Ascomycetes is:

 
 
 
 

47. Liverworts are included in :

 
 
 
 

48. Aflatoxin is produced as a product in :

 
 
 
 

49. Zygote which divides by meiotic division (zygotic meiosis occurs in):

 
 
 
 

50. Linnaeus is credited with introducing:

 
 
 
 

51. The multinucleate and aseptate hypha of Rhizopus are known as:

 
 
 
 

52. The branch of Botany under which fungi are studied is known as:

 
 
 
 

53. Each cell of Volvox colony has a structure, similar to:

 
 
 
 

54. Little leaf disease of Brinjal is caused by:

 
 
 
 

55. According to the fossil record, which event has occurred most recently?

 
 
 
 

56. In the five kingdom system of classification, slime molds are included in:

 
 
 
 

57. System of classification presented by a Russian botanist A. Takhtajan is:

 
 
 
 

58. In the two kingdom system of classification, Euglena is included in:

 
 
 
 

59. Which are non-seed-bearing vascular plants?

 
 
 
 

60. Synzoospore is produced in:

 
 
 
 

61. Which of the following structures help in respiration of lichens?

 
 
 
 

62. The number of neck canal cells in Cycas are:

 
 
 
 

63. Which of the following applies to Selaginella?

 
 
 
 

64. Diaminopimelic acid and muramic acid are constituents of cell walls in:

 
 
 
 

65. Male gametes in Dryopteris are:

 
 
 
 

66. Yeast grows more rapidly in:

 
 
 
 

67. Acetobacter is useful in:

 
 
 
 

68. Funaria is :

 
 
 
 

69. Chief constituents of bordeaux mixture are :

 
 
 
 

70. ‘Die naturlichen Pflanzen Familien’ which runs into 20 volumes was written by:

 
 
 
 

71. The cell wall of bacteria is made-up of:

 
 
 
 

72. Doctors usually boil their syringe and other surgical instruments before use:

 
 
 
 

73. Which is a group of ancient photosynthetic prokaryotes which give oxygen during photosynthesis?

 
 
 
 

74. Funaria is a Bryophyta because :

 
 
 
 

75. The spur of Pinus roxburghii has :

 
 
 
 

76. Ginkgo biloba is a:

 
 
 
 

77. The virus responsible for AIDS is an example of a (an):

 
 
 
 

78. Cap cells are found in the filament of:

 
 
 
 

79. Most primitive kind of flower is represented by:

 
 
 
 

80. Binomial system of nomenclature means that every organism has:

 
 
 
 

81. Chemosynthetic bacteria are:

 
 
 
 

82. Nannandria are:

 
 
 
 

83. Mixed cropping helps :

 
 
 
 

84. Parmelia belongs to :

 
 
 
 

85. The fungi used as food are:

 
 
 
 

86. Mycoplasmas are not viruses in nature because:

 
 
 
 

87. The basal-cell by which an alga is attached to its substratum is known as :

 
 
 
 

88. The roots of Cycas are :

 
 
 
 

89. Select the correct statement: (NEET 2016)

 
 
 
 

90. “Families of flowering plants” Vol I (1926) and Vol II (1934) was written by:

 
 
 
 

91. What is streptomycin?

 
 
 
 

92. Bacteria which are spherical are called:

 
 
 
 

93. The site where the protein coat of virus is synthesized is:

 
 
 
 

94. Tautonyms are illegitimate in:

 
 
 
 

95. The two conjugating gametangia of Rhizopus are:

 
 
 
 

96. System of classification proposed by Bentham and Hooker is:

 
 
 
 

97. Kuru, a human disease is caused by:

 
 
 
 

98. D.C. Gajdusek was awarded the Nobel Prize for discovery of prion based diseases in:

 
 
 
 

99. In Cycas, the vascular bundle of a leaflet is :

 
 
 
 

100. What is the role of nitrifying bacteria?

 
 
 
 

101. Among the currently used drugs for treating tuberculosis are:

 
 
 
 

102. ‘Snakes of Plant Kingdom’ is :

 
 
 
 

103. . In Bryophytes and Pteridophytes, transport of male gametes requires: (NEET 2016)

 
 
 
 

104. TMV was isolated in crystalline form by:

 
 
 
 

105. Bacteria which are found in marshy areas and among the flora of cattle rumen are called:

 
 
 
 

106. Which one of the following is an endozoic algae?

 
 
 
 

107. In a bacteriophage, DNA is present in:

 
 
 
 

108. The scientist who is famous for his research on rust fungi in India is :

 
 
 
 

109. Most primitive group of vascular plants are:

 
 
 
 

110. Plasmids are:

 
 
 
 

111. Multicellular and jacketed sex organs are found in :

 
 
 
 

112. Which of the following is a beneficial activity of microorganisms?

 
 
 
 

113. The total number of families of Angiosperm in Hutchinson’s classification are:

 
 
 
 

114. Total parasites belong to:

 
 
 
 

115. In Pteris, the roots are:

 
 
 
 

116. Heterospory and ligulate leaves are a feature of:

 
 
 
 

117. The bacteria, which are smallest in size are:

 
 
 
 

118. Climbers are found in genus:

 
 
 
 

119. What is the reserve food material in chlorophycean algae?

 
 
 
 

120. A gill of Agaricus:

 
 
 
 

121. Gram stain is used to:

 
 
 
 

122. Common phycobiont in a lichen is :

 
 
 
 

123. Which character in a Cycas leaflet indicates its xerophytic nature?

 
 
 
 

124. Which of the following is necessary for the process of conjugation in bacteria?

 
 
 
 

125. The most primitive vascular plants is:

 
 
 
 

126. The green upright sterile hair-like structures among the antheridia in moss are known as :

 
 
 
 

127. The antheridia in Funaria are formed at the apex of the male shoot in :

 
 
 
 

128. The antheridia of fern are different from that of moss in the sense that they produce:

 
 
 
 

129. Prions are pathogens that are thought to consist solely of:

 
 
 
 

130. The largest known bacterium is:

 
 
 
 

131. Anoxygenic photosynthesis occurs in:

 
 
 
 

132. Ethylene oxide is widely used to:

 
 
 
 

133. In which group would you place a plant that reproduces by spores, develops embryo but plant body remains undifferentiated into root, stem and leaves?

 
 
 
 

134. Rigid cell wall and embryo formation characterise kingdom :

 
 
 
 

135. Which of the following statement is correct?

 
 
 
 

136. For the disease of red stripe of sugarcane the bacterium responsible is:

 
 
 
 

137. Some biologists have used the term Mycetozoa for:

 
 
 
 

138. Formation of gametophyte-like structure from sporophyte without reduction division is called (i.e., without formation of spores):

 
 
 
 

139. Meiosis in Ulothrix takes place:

 
 
 
 

140. A diseased leaf shows some areas with dead tissue. This symptom is often referred to as :

 
 
 
 

141. Typhoid in man is caused by:

 
 
 
 

142. ‘Snakes of Plant Kingdom’ is:

 
 
 
 

143. Chemicals which are applied soon after the outset of infection, suppress the development of pathogen, thus curing the plant, are called :

 
 
 
 

144. Bacteria differ from viruses in being sensitive to:

 
 
 
 

145. Which of the following are absent in Mycoplasma?

 
 
 
 

146. Spores formed at the tip of fungal hyphae are called:

 
 
 
 

147. Nucleus in Spirogyra is suspended in the cell with the help of :

 
 
 
 

148. Sexual reproduction of lichen is due to :

 
 
 
 

149. Heterotrichous habit means :

 
 
 
 

150. Which is a redwood tree?

 
 
 
 

151. Leptothrix is an example of iron bacteria Which of the following statements best fit the iron bacteria?

 
 
 
 

152. Which of the following disease is caused by virus?

 
 
 
 

153. Water-net is the name of:

 
 
 
 

154. The nucleus of bacteria is:

 
 
 
 

155. Vegetative reproduction in Cycas is by means of :

 
 
 
 

156. The gametophyte of fern bears:

 
 
 
 

157. The five kingdom system of classification was proposed by:

 
 
 
 

158. Which type of sexual reproduction is found in C. brauni?

 
 
 
 

159. The male gametes of Pinus are :

 
 
 
 

160. Isomorphic type alternation of generation is found in:

 
 
 
 

161. Chrysanthemum stunt disease and potato spindle tuber disease are caused by:

 
 
 
 

162. Sexual reproduction in Rhizopus is by:

 
 
 
 

163. When the F-factor enters a recipient cell during conjugation, the recipient cell:

 
 
 
 

164. Pteridophytes are also known as :

 
 
 
 

165. Elongated structure on upper cortex of lichen, having some algal and fungal partners as in main thallus is :

 
 
 
 

166. A control measure prior to the appearance of a particular disease comes under :

 
 
 
 

167. Pinus microsporophyll bears:

 
 
 
 

168. The chromosomal number in:

 
 
 
 

169. Which organisms are the oldest life forms?

 
 
 
 

170. Retting is a process, by which bacteria bring about the:

 
 
 
 

171. Ex situ conservation of endangered wildlife flora and fauna is possible through:

 
 
 
 

172. Pasteurized milk is:

 
 
 
 

173. Leaves of pea show white powdery patches due to the growth of fungal mycelium with conidia and conidiophores. These are the symptoms of :

 
 
 
 

174. The causal organism of early blight of potato is :

 
 
 
 

175. In which of the following, isogamy, anisogamy and oogamy all are found?

 
 
 
 

176. Severe famine of West Bengal of 1942-43 was due to destruction of rice crop by a fungus called:

 
 
 
 

177. Which of the following characteristics is associated with specialized transduction?

 
 
 
 

178. In which order of Gymnosperms only fossils are present?

 
 
 
 

179. Substances released by some bacteria to cause toxicity in host are:

 
 
 
 

180. Mycelium is the name given to the plant body of:

 
 
 
 

181. A control measure prior to the appearance of a particular disease comes under:

 
 
 
 

182. The method of reproduction in bacterium, in which a virus participates is:

 
 
 
 

183. Acellular slime mold is/are:

 
 
 
 

184. Most of the lichens are composed of :

 
 
 
 

185. Which group of plants have spores, vascular bundles and no seeds?

 
 
 
 

186. Total number of families of angiosperms in Bentham and Hooker’s system classification is:

 
 
 
 

187. Iodine is obtained from:

 
 
 
 

188. Lichens are indicators of :

 
 
 
 

189. According to Woese, fungi were placed in the domain :

 
 
 
 

190. Who among the following discovered virus?

 
 
 
 

191. Generic name of mango is:

 
 
 
 

192. Most common type of conjugation in Spirogyra is :

 
 
 
 

193. Spores of which plants have chloroplast:

 
 
 
 

194. Penicillin was discovered by:

 
 
 
 

195. Choose the correct statement about Spirogyra:

 
 
 
 

196. Which is a gametophytic tissue?

 
 
 
 

197. Placenta in fern is:

 
 
 
 

198. An infectious agent associated with certain mammalian degenerative disease that is composed solely of protein, is known as:

 
 
 
 

199. The life cycle of Funaria is not completed without water because of:

 
 
 
 

200. Which one is the smallest organism capable of autonomous growth and reproduction?

 
 
 
 

201. Cell walls of Gram-positive bacteria contain:

 
 
 
 

202. Ergot is obtained from :

 
 
 
 

203. Vascular cryptogam is the term used for :

 
 
 
 

204. The chief characteristic of fern leaf is that they:

 
 
 
 

205. A part of pathogen that is transmitted to the host is termed as :

 
 
 
 

206. The plants which produce embryo but lack vascular tissue and seeds are placed in :

 
 
 
 

207. A number of short stalked sporangia attached with placenta and covered by indusium is called:

 
 
 
 

208. The sporangium of fern contains nearly:

 
 
 
 

209. If a sporangium developed from a group of cells it is called:

 
 
 
 

210. Bacteria that are pathogenic in the body grow at temperatures:

 
 
 
 

211. Lichens are pioneers of vegetation in a :

 
 
 
 

212. In which of the following diploid stage is usually dominant?

 
 
 
 

213. Which of the following does not help in penetration of pathogen into the host?

 
 
 
 

214. The most important property of yeast is:

 
 
 
 

215. Pollination in Cycas takes place by :

 
 
 
 

216. Usually bacteria do not require light for synthesis of food:

 
 
 
 

217. In Pteris, the archegonia are present:

 
 
 
 

218. In prokaryotes, the mitochondria are absent. Even then Krebs’ cycle takes place. What is the site of Krebs’ cycle in bacteria?

 
 
 
 

219. The ascus of yeast contains:

 
 
 
 

220. Spermatophyta are characterized by producing:

 
 
 
 

221. Water-borne bacterial diseases are:

 
 
 
 

222. Plant body is violettish-blue or blue-green in:

 
 
 
 

223. Saccharomyces ludwigii ascus produces:

 
 
 
 

224. AIDS (= Acquired Immune Deficiency Syndrome) is caused by:

 
 
 
 

225. The chief enzyme found in the yeast cell is:

 
 
 
 

226. Which of the following have a prokaryotic cell?

 
 
 
 

227. The tallest living gymnosperm tree in the world belongs to :

 
 
 
 

228. The sexual reproductive organs in Rhizopus are:

 
 
 
 

229. Male gametophyte of Selaginella is found:

 
 
 
 

230. Which of the following organisms has characters of both animals and plants?

 
 
 
 

231. The fungi are mostly:

 
 
 
 

232. Agar-agar is obtained from:

 
 
 
 

233. Nomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature:

 
 
 
 

234. In Cycas which structure is equivalent to stamen?

 
 
 
 

235. A substance (a low molecular weight protein) produced by host cells in response to viral infection, that protects other cells against further viral infection is:

 
 
 
 

236. The stele of Dryopteris is a:

 
 
 
 

237. Which family of bacteria can decompose a wide variety of organic compounds, natural or man-made, including inert ones like hydrocarbons? This property has actually been used by scientists to reduce pollution such as that from petroleum spillage:

 
 
 
 

238. Photoautotrophic bacteria have:

 
 
 
 

239. Bryophyta have a special character from other plants:

 
 
 
 

240. Disease resistant plant varieties can be produced by :

 
 
 
 

241. Ectocarpus produces:

 
 
 
 

242. The gametophyte of fern is as:

 
 
 
 

243. Lichens are the indicator of pollution :

 
 
 
 

244. Which of the following does not contain chlorophyll?

 
 
 
 

245. The group algae possesses representatives belonging to kingdom:

 
 
 
 

246. Most of the algae are :

 
 
 
 

247. In moss, peristomial teeth are:

 
 
 
 

248. Diphtheria is caused by:

 
 
 
 

249. The spermatozoids of Cycas are :

 
 
 
 

250. The sporophyte of Riccia is :

 
 
 
 

251. Which group of plants have spores, vascular bundles but no flowers?

 
 
 
 

252. Bacteria which are highly spiral in shape are called:

 
 
 
 

253. Halophiles are the bacteria that require for growth:

 
 
 
 

254. Cocci types of bacteria are:

 
 
 
 

255. Inverted omega-shaped arrangement of vascular bundles is found in :

 
 
 
 

256. Dryopteris prothallus is bisexual but the type of gametic union is generally by:

 
 
 
 

257. Pollination in Pinus is :

 
 
 
 

258. Nonmotile, thin-walled spores of algae are called :

 
 
 
 

259. Streptomycin is obtained from:

 
 
 
 

260. The seed known by the name of ‘chilgoza’ that is used as dry fruit belongs to :

 
 
 
 

261. An English surgeon believed that microorganisms of the air caused infection in the wound and to avoid the infection, he used carbolic acid and hence he became the father of modern antiseptic surgery. His name is:

 
 
 
 

262. Heterospory is the production of:

 
 
 
 

263. The chief characteristic of bryophyta is that :

 
 
 
 

264. All but one group are included in tracheophyta; which group is this :

 
 
 
 

265. Cycas is similar to a mustard plant :

 
 
 
 

266. Pasteur is famous for his:

 
 
 
 

267. Winged seeds are found in :

 
 
 
 

268. Asexual reproductive bodies in some higher mycelial bacteria (eg, Actinomycetous forms) are:

 
 
 
 

269. Which is an edible fungus?

 
 
 
 

270. Each chloroplast in Spirogyra bears :

 
 
 
 

271.

 

272. Mycoplasma are:

 
 
 
 

273. In a diplontic life cycle:

 
 
 
 

274. Ovary is absent in:

 
 
 
 

275. Special feature of pollen grains of Pinus is :

 
 
 
 

276. Which is a tautonym?

 
 
 
 

277. The common name of Funaria, by which it is generally known, is :

 
 
 
 

278. Which of the following is not a viral disease?

 
 
 
 

279. . Tapetum develops in:

 
 
 
 

280. Oswald Tippo’s classification was based on :

 
 
 
 

281. The rhizoids of Funaria are :

 
 
 
 

282. When the gametophyte is not formed by spores but by any other part of sporophyte it is known as :

 
 
 
 

283. The Rhizopus is:

 
 
 
 

284. The development of sporangium in Selaginella is:

 
 
 
 

285. Discovery of penicillin was based on:

 
 
 
 

286. Lichen show :

 
 
 
 

287. Photosynthetic protists contribute what percentage of global photosynthesis:

 
 
 
 

288. Bacteria which convert elemental nitrogen into nitrogenous substances are:

 
 
 
 

289. In Funaria, calyptra is derived from :

 
 
 
 

290. Black rust of wheat is caused by:

 
 
 
 

291. Amphiphloeic siphonostele develops in rhizome of:

 
 
 
 

292. The lichens growing on rocks are called :

 
 
 
 

293. Biciliate antherozoids are found in which of the following?

 
 
 
 

294. For purposes of microbial control, the term sterilization implies:

 
 
 
 

295.

296. Pinus is:

 
 
 
 

297. Spirogyra represents the :

 
 
 
 

298. Which of the following protein is associated with prion disease?

 
 
 
 

299. In pteridophytes, meiosis occurs at the stage of:

 
 
 
 

300. Why is Cycas called a living fossil?

 
 
 
 

301. In Cycas the fertilization is:

 
 
 
 

302. The disease symptom necrosis refers to :

 
 
 
 

303. Who discovered streptomycin?

 
 
 
 

304. How is moss different from fern?

 
 
 
 

305. Which of the following plants does not belong to Embryophyta?

 
 
 
 

306. Which class of Protozoa includes all parasitic forms?

 
 
 
 

307. Sleeping sickness disease in man is caused by:

 
 
 
 

308. Zygospores may not be produced in Rhizopus due to:

 
 
 
 

309. Infective nature of Tobacco mosaic disease was discovered by:

 
 
 
 

310. Facultative saprophyte is:

 
 
 
 

311. The capsid of TMV is made-up of nearly:

 
 
 
 

312. Black rust of wheat is caused by:

 
 
 
 

313. Cycas revoluta is widely grown as :

 
 
 
 

314. What is absent in Deuteromycetes?

 
 
 
 

315. Fertility of the soil is increased by:

 
 
 
 

316. True sexuality is not found in:

 
 
 
 

317. Fern and Cycas are similar in the presence of:

 
 
 
 

318. Proembryo in Pinus is :

 
 
 
 

319. The foliose lichens are attached to substratum by means of :

 
 
 
 

320. Most appropriate word for protozoans is:

 
 
 
 

321. In Cycas wood most of the tissue is made up of :

 
 
 
 

322. A microbiologist found that some bacteria infected by phages had developed the ability to make a particular amino acid that they could not make before. This ability was probably a result of:

 
 
 
 

323. Who discovered heterothallism in fungi?

 
 
 
 

324. Winged pollen grains are found in :

 
 
 
 

325. Coralloid roots of Cycas is distinguished from Angiosperm roots by :

 
 
 
 

326. Which plays an important role in the dispersal of spores in Funaria?

 
 
 
 

327. Which scientist in 1884 developed a valuable method of staining the bacteria?

 
 
 
 

328. The role of meiosis is for:

 
 
 
 

329. Ergot of rye is caused by:

 
 
 
 

330. If a disease appears on a large scale after a long interval it is:

 
 
 
 

331. Commonest mode of asexual reproduction in bacteria is:

 
 
 
 

332. Which statement is wrong in regard to bacteria?

 
 
 
 

333. A plant which reproduces by spores, has vascular tissue but lacks flowers should belong to:

 
 
 
 

334. Cellular slime mold is:

 
 
 
 

335. Bacteriophage consists of:

 
 
 
 

336. The middle sterile part of capsule is called:

 
 
 
 

337. The decomposition of organic compounds in the presence of O2 and without the development of odoriferous substances is called:

 
 
 
 

338. If a sporangium is derived from a single cell it is called:

 
 
 
 

339. Ovules are not found enclosed in ovary of:

 
 
 
 

340. The first to isolate a plant virus was:

 
 
 
 

341. Which type of sexual reproduction is found in C. coccifera?

 
 
 
 

342. The leaves of Funaria are :

 
 
 
 

343. The science of study of bacteria is known as bacteriology. The name bacteria was first of all given by:

 
 
 
 

344. Fairy ring is the name given to:

 
 
 
 

345. Which is not the characteristic feature in Spirogyra life history?

 
 
 
 

346. The ferns are usually found:

 
 
 
 

347. One of the major components of the cell wall of most fungi is: (NEET 2016)

 
 
 
 

348. Plant body is diploid and meiosis occurs in diploid gametangia at the time of formation of gametes in:

 
 
 
 

349. For the archegonium of Pinus which statement is true?

 
 
 
 

350. Ovules are not found enclosed in ovary in :

 
 
 
 

351. Asexual reproductive body of Volvox is called:

 
 
 
 

352. Nitrifying bacteria play an important role by converting:

 
 
 
 

353. The common bacterium, which lives in the human intestine is:

 
 
 
 

354. When an infection is very wide in occurrence, it is called :

 
 
 
 

355. Water bloom is generally caused by :

 
 
 
 

356. Which of the following converts CO₂ into carbohydrates?

 
 
 
 

357. In plants, the substances which accumulate around the site of infection are :

 
 
 
 

358. Which of the following is wrong for fungi? (NEET 2016)

 
 
 
 

359. In Cycas:

 
 
 
 

360. Which one of the following belong to cryptogams only:

 
 
 
 

361. Bacteria growing on synthetic medium are called:

 
 
 
 

362. The zygospores formed by the conjugation of gametangia are:

 
 
 
 

363. Infective portion of a virus is nucleic acid, this was discovered by:

 
 
 
 

364. One of the distinctive feature of Spirogyra is :

 
 
 
 

365. The megasporangia of Selaginella can be identified due to their:

 
 
 
 

366. Downy mildew disease is caused by :

 
 
 
 

367. Which of the following plants does not have archegonium?

 
 
 
 

368. Spermatophyta are characterized by producing:

 
 
 
 

369. Megasporophylls of Pteridophyta are comparable to which structure of Angiosperms?

 
 
 
 

370. In moss, stomata are found:

 
 
 
 

371. Enteric bacteria are those bacteria that live:

 
 
 
 

372. NBG of Lucknow is now named as:

 
 
 
 

373. The leafy fern plant represents the:

 
 
 
 

374. Ovules are not found enclosed in ovary in :

 
 
 
 

375. Which is not true for Escherichia coli?

 
 
 
 

376.

377. Important feature of Spirogyra that distinguishes it from Ulothrix is :

 
 
 
 

378. The number of androcytes in male prothallus of Selaginella are:

 
 
 
 

379. Heterocysts are found in :

 
 
 
 

380. The zoospores of Ulothrix are :

 
 
 
 

381. Which of the following lichens is harmful?

 
 
 
 

382. Azolla growing in paddy fields helps in:

 
 
 
 

383. Aflatoxin is produced by:

 
 
 
 

384. All the following human diseases are due to members of the genus Clostridium except:

 
 
 
 

385. Ancestors of Bryophyta were some aquatic plants is clear from the fact that :

 
 
 
 

386. The bacteria that can spoil under-processed canned food are:

 
 
 
 

387. Pteridophyta are also called:

 
 
 
 

388. It is sometimes seen that conjugation between two hyphae of Rhizopus does not take place even in most favourable conditions because:

 
 
 
 

389. If the sporangia in a sorus are in different stages of development and are intermixed, this condition is called:

 
 
 
 

390. Where does meiosis occur in yeast?

 
 
 
 

391. The microsporophylls on the cone of Cycas are :

 
 
 
 

392. Which of the following causes smut disease in wheat?

 
 
 
 

393. The photosynthetic protists are:

 
 
 
 

394. Leprosy is caused by:

 
 
 
 

395. When a diseased plant is legally stopped from export, this is done under :

 
 
 
 

396. Which is not likely to be found on sea shore?

 
 
 
 

397. Enzymes are absent in:

 
 
 
 

398. Club moss is the common name of :

 
 
 
 

399. To introduce a foreign gene in a plant, which one is used?

 
 
 
 

400. Which fixes atmospheric nitrogen?

 
 
 
 

401. Nitrogen-fixing bacteria may be located:

 
 
 
 

402. A group of genera which show general structural resemblances to one another mainly in their floral organs is referred to as:

 
 
 
 

403. Agar-agar and algin are the product of:

 
 
 
 

404. Which of the following would appear as the pioneer organism on bare rocks :

 
 
 
 

405. The archegonia in Selaginella develop on:

 
 
 
 

406. In moss, sporophyte is formed on:

 
 
 
 

407. The mycelium of Rhizopus is:

 
 
 
 

408. The photoreceptor found at the anterior end of Chlamydomonas is:

 
 
 
 

409. Substances obtained from microorganisms and used to inhibit the growth of other microorganisms are:

 
 
 
 

410. Conifers are adapted to tolerate extreme environmental conditions because of: (NEET 2016)

 
 
 
 

411. Protists which are diploid reproduce sexually by:

 
 
 
 

412. All archaebacteria lack:

 
 
 
 

413.

414. A disease is abnormal state that may result due to :

 
 
 
 

415. Which part of the plant is not affected by Albugo?

 
 
 
 

416. The most common method of vegetative reproduction in yeast is:

 
 
 
 

417. Botulism is a:

 
 
 
 

418. In which of the following plants would you place heterotrophs like slime moulds, rusts, mushrooms, etc.?

 
 
 
 

419. White rust of crucifers is caused by:

 
 
 
 

420. Body disorders due to harmful physiological changes are known as :

 
 
 
 

421. In which of the following, RNA is double stranded:

 
 
 
 

422. Hormogonia are the vegetative reproductive structures of :

 
 
 
 

423. Rhizopus is also commonly known by the name of:

 
 
 
 

424. John Hutchinson divided dicots into two divisions:

 
 
 
 

425. Germination of the seed of Pinus is :

 
 
 
 

426. Usually, bacteria reproduce by:

 
 
 
 

427. For the production of which microbial action is not required?

 
 
 
 

428. Capsella bursa-pastoris exhibit a life cycle which is:

 
 
 
 

429. The fungi that grow on wood are called:

 
 
 
 

430. Pasteurization of milk involves heating for:

 
 
 
 

431. In tracheophyta:

 
 
 
 

432. The mode of nutrition of bacteria is usually:

 
 
 
 

433. The secondary xylem of the vascular bundles of Cycas is usually :

 
 
 
 

434. If a disease appear on large scale after a long interval it is :

 
 
 
 

435. The upper region of moss capsule is :

 
 
 
 

436. Yellow vein Mosaic of Bhindi Virus (Hibiscus Virus-I) is transmitted through:

 
 
 
 

437. The structure formed by the bacterial genome is generally called as:

 
 
 
 

438. Group of viruses, which attack members of Myxophyceae are termed as:

 
 
 
 

439. Columella is a specialized sterile structure found in sporangium of:

 
 
 
 

440. Match column I with column II and select the correct option using the codes given below:

| Column I | Column II |
|——————|—————–|
| A Citric acid | (i) Trichoderma |
| B Cyclosporin A | (ii) Clostridium|
| C Statins | (iii) Aspergillus|
| D Butyric acid | (iv) Monascus |

Codes:

| | A | B | C | D |
|——|—|—|—|—|
| (a) | i | iv| ii| iii|
| (b) | iii| iv| i | ii|
| (c) | iii| i | ii| iv|
| (d) | iii| i | iv| ii|

Answer: (d) iii, i, iv, ii

Explanation: The correct matching is:
– A Citric acid – (iii) Aspergillus
– B Cyclosporin A – (i) Trichoderma
– C Statins – (iv) Monascus
– D Butyric acid – (ii) Clostridium

179 Which of the following sets of diseases is caused by bacteria?

 
 
 
 

441. Certain leafless non-green branches produced from Selaginella are:

 
 
 
 

442. Bryophyta have been placed in cryptogams because:

 
 
 
 

443. Which type of sexual reproduction is found in C. debaryana?

 
 
 
 

444. Eligulate, eusporangiate, homosporous, protostelic pteridophyte is:

 
 
 
 

445. Germ theory of disease was proposed by:

 
 
 
 

446. Centric discoid form of diatom is:

 
 
 
 

447. Wine turns sour because of:

 
 
 
 

448. ‘Diatomaceous Earth’ is deposition of:

 
 
 
 

449. Name the scientist who gave dual hypothesis for lichens?

 
 
 
 

450. Photosynthetic protists belong to:

 
 
 
 

451. Sometimes different authors give different names to one and the same species. In such a situation:

 
 
 
 

452. The zygospore in Rhizopus on germination forms:

 
 
 
 

453. Virion refers to:

 
 
 
 

454. RNA particle causing symptoms like that of a virus disease are known as:

 
 
 
 

455. Which of the following structures help in retaining moisture?

 
 
 
 

456. All protozoans possess:

 
 
 
 

457. Ulothrix and Spirogyra are filamentous and :

 
 
 
 

458. Bentham and Hooker placed gymnosperms:

 
 
 
 

459. Rejuvenescent cells (auxospores) occur in:

 
 
 
 

460. Select the wrong statement:

 
 
 
 

461. Standard size of a herbarium sheet is:

 
 
 
 

462. Reproduction in Rhizopus is:

 
 
 
 

463. The structure produced from germination of a microspore of Selaginella is:

 
 
 
 

464. Majority of lichens are :

 
 
 
 

465. Sporophyte of fern is:

 
 
 
 

466. Who discovered cyanophages?

 
 
 
 

467. Which of the following plants does not belong to Embryophyta?

 
 
 
 

468. Red rot of sugarcane is caused by :

 
 
 
 

469. A branch of science that deals with nature, symptoms, development and control of plant diseases is called :

 
 
 
 

470. The importance of study of parasitic fungi is that they are:

 
 
 
 

471. Pythium debaryanum is the causative agent of:

 
 
 
 

472. Protistan algae obtain their food as:

 
 
 
 

473. Which part of the plant is not affected by Albugo?

 
 
 
 

474. Adaxial outgrowth from the base of the leaf of Selaginella is:

 
 
 
 

475. Iodine is obtained from :

 
 
 
 

476. The seedless plants which possess vascular tissues are:

 
 
 
 

477. There is a class of phenolic compounds produced by the host plant in response to fungal infections :

 
 
 
 

478. To sterilize glassware and the culture medium, which equipment is used?

 
 
 
 

479. Sometimes a gamete of Rhizopus functions as zygospore. It is known as:

 
 
 
 

480. Genetically engineered bacteria have been successfully used in the commercial production of:

 
 
 
 

481. Development of sporophyte from gametophyte without sexual reproduction is called :

 
 
 
 

482. The megasporophyll of Cycas is equivalent to which part of Angiosperm?

 
 
 
 

483. On germination, each zygospore of Spirogyra divides meiotically into four, but the number of filaments produced is :

 
 
 
 

484. What is special feature of fern archegonia?

 
 
 
 

485. Pseudomycelium is found in:

 
 
 
 

486. Spirogyra differs from moss protonema in having :

 
 
 
 

487. Cycas is:

 
 
 
 

488. When a fungus is able to pass its complete life cycle on one host it is called:

 
 
 
 

489. Seeds are characteristically found in:

 
 
 
 

490. Virus and bacteriophage are made-up of:

 
 
 
 

491. Richest source of protein, becoming popular throughout world and available in the Indian market also:

 
 
 
 

492. Triple antigen injection or vaccine are for:

 
 
 
 

493. Metulae are found in:

 
 
 
 

494. Indusium in Dryopteris is:

 
 
 
 

495. In bacterial chromosome, the nucleic acid polymers are:

 
 
 
 

496. Mycoplasma contains:

 
 
 
 

497. Facultative parasite is:

 
 
 
 

498. The plants of Funaria grow :

 
 
 
 

499. Methanogens belong to:

 
 
 
 

500. attract the antherozoids of Funaria towards their archegonium:

 
 
 
 

501. Scientific name of Mango is Mangifera indica L. Here L represents:

 
 
 
 

502. Cycas plant in appearance resembles :

 
 
 
 

503. Leaf spot of groundnut is caused by :

 
 
 
 

504. Prof. R.N. Singh has noteworthy contributions in the field of:

 
 
 
 

505. Fruits are not found in Cycas because:

 
 
 
 

506. In dinoflagellates, the two flagella are:

 
 
 
 

507. Most of the algae along with other submerged plants usually float on water during the day time, while they sink at night, because :

 
 
 
 

508. Ulothrix and Spirogyra reproduce vegetatively by :

 
 
 
 

509. Which of the following is the kingdom of multicellular producers?

 
 
 
 

510. Lichens form the first community in

 
 
 
 

511. Of all organisms, the most adaptable and versatile are:

 
 
 
 

512. When the seeds are borne on megasporophylls and are not enclosed in a fruit, the plant belongs to :

 
 
 
 

513. Citrus canker is caused by:

 
 
 
 

514. In Molecular Biology, E coli has been used in studying:

 
 
 
 

515. Which of the following shows heterotrichous habit?

 
 
 
 

516. The tree fern is:

 
 
 
 

517. Bacteria are placed under:

 
 
 
 

518. Most of the biological names have been derived from:

 
 
 
 

519. Etiology includes the study of :

 
 
 
 

520. Cleavage polyembryony is found in :

 
 
 
 

521. Spirogyra is commonly known by the name of ‘Pond scum’ or ‘Pond silk’ because :

 
 
 
 

522. What are Cyanobacteria?

 
 
 
 

523. Funaria can be differentiated from Cycas :

 
 
 
 

524. Which one of the following is a monocot?

 
 
 
 

525. Which have the largest antherozoid?

 
 
 
 

526. Atracheata term has been used by Oswald Tippo for :

 
 
 
 

527. The Protists in which cell size decreases with each division are:

 
 
 
 

528. Shedding of pollen grains in Pinus takes place at :

 
 
 
 

529. Rhizopus, which is saprophytic by nature, is also known as:

 
 
 
 

530. Club moss and Peat moss belong to:

 
 
 
 

531. Which of the following is true for Selaginella?

 
 
 
 

532. Under suitable conditions, some bacteria are capable of reproducing by binary fission once every half hour. Suppose you placed a single bacterium in a culture medium and it (and its descendants) proceeded to reproduce at this rate. How many bacteria would be present after 5 hours?

 
 
 
 

533. The fungi are usually:

 
 
 
 

534. Chrysophytes, Euglenoides, Dinoflagellates, and slime molds are included in the kingdom:

 
 
 
 

535. Bivalved siliceous shell or frustule occur in:

 
 
 
 

536. Pteridophytes as a group differ from Bryophytes and Thallophytes in having:

 
 
 
 

537. The species which are highly restricted in distribution are called:

 
 
 
 

538. Most primitive embryophytes are placed in:

 
 
 
 

539. Among the algae kelps are :

 
 
 
 

540. Siphonogamy is found in:

 
 
 
 

541. The sori of Dryopteris are covered by a thick multicellular covering known as:

 
 
 
 

542. Which is the nuclear material in bacteria?

 
 
 
 

543. The term stele was given by:

 
 
 
 

544. Mycoplasma is different from bacteria due to:

 
 
 
 

545. . In Oswald and Tippo’s system of classification, Pteropsida does not include:

 
 
 
 

546. Black rust of wheat is caused by:

 
 
 
 

547. In between the sex organs of Funaria are found a number of hair-like structures which are known as :

 
 
 
 

548. In which of the following plants is the sporophyte a dominant phase in the life cycle?

 
 
 
 

549. Which among the following is a shrub?

 
 
 
 

550. Selaginella differs from Moss in having:

 
 
 
 

551. The coralloid roots are :

 
 
 
 

552. Mucilaginous canals in Cycas are found in :

 
 
 
 

553. In moss, reduction division occurs in :

 
 
 
 

554. Which group of algae have an incipient nucleus?

 
 
 
 

555. Which bacteria convert nitrate into nitrogen?

 
 
 
 

556. The xylem of stele of fern rhizome is made up of:

 
 
 
 

557. Where are the antheridia and archegonia situated in moss?

 
 
 
 

558. Who is known as ‘Father of Taxonomy’?

 
 
 
 

559. LSD is:

 
 
 
 

560. Beijerinck isolated a free living nitrogen fixer bacterium, named:

 
 
 
 

561. The spores of Funaria on germination give rise to :

 
 
 
 

562. Diatoms are not destroyed easily like other algae, because:

 
 
 
 

563. Woody climbers are known as :

 
 
 
 

564. Which of the following is not a correct match?

 
 
 
 

565. Genera Plantarum which appeared in three volumes from 1862-1883 was written by:

 
 
 
 

566. In moss, calyptra is formed from:

 
 
 
 

567. Helminthosporium oryzae was the cause of disaster :

 
 
 
 

568. Azolla and Salvinia both are:

 
 
 
 

569. Milk is converted to curd by:

 
 
 
 

570. The antherozoids of Funaria are :

 
 
 
 

571. When milk or other products are heated for about half an hour at about 62°C and then cooled, the process is called:

 
 
 
 

572. The smallest unit of classification is:

 
 
 
 

573. The genetic material of poxvirus is:

 
 
 
 

574. In bryophytes and pteridophytes, transport male gametes requires:

 
 
 
 

575. In Gymnocarpeae the fruiting body is :

 
 
 
 

576. Atracheata term has been used by O. Swiald Tippo for:

 
 
 
 

577. An organism that lacks plastids, even then it manufactures its own food material:

 
 
 
 

578. Fern phloem lacks:

 
 
 
 

579. Psychrophilic bacteria are those bacteria that grow best:

 
 
 
 

580. The columella of moss is the region of moss capsule :

 
 
 
 

581. Bacteriovirdin pigments are found in which bacteria:

 
 
 
 

582. Chemoautotrophic nitrifying bacteria are:

 
 
 
 

583. The capsule of fern sporangium bursts at a place called:

 
 
 
 

584. Which of the lichen live as a crust over soil, rocks and branches of trees?

 
 
 
 

585. Vascular cryptogams is the term used for:

 
 
 
 

586. Psilotum is:

 
 
 
 

587. Azotobacter and Beijerinckia are the examples of:

 
 
 
 

588. A perennial that bears flowers and fruits once in a life time is known as :

 
 
 
 

589. The stem-like character of rhizophore of Selaginella is:

 
 
 
 

590. The sori bearing leaves of fern are known as:

 
 
 
 

591. Marsilea quadrifolia has only four leaflets. It is a:

 
 
 
 

592. Maximum diversity of life forms occurs in :

 
 
 
 

593. The leaves of Funaria are :

 
 
 
 

594. Streptomyces falls under:

 
 
 
 

595. An Hfr bacterium is one that contains:

 
 
 
 

596. In nitrification, Nitrosomonas bacteria converts:

 
 
 
 

597. The number of cotyledons in the embryo of Pinus are :

 
 
 
 

598. Banana bunchy top is caused by :

 
 
 
 

599. A special structure is born in between the microsporophyll and microsporangium of Selaginella. It is called:

 
 
 
 

600. Amoeba is placed in the phylum Protozoa because of:

 
 
 
 

601. In Selaginella, the microsporangia are:

 
 
 
 

602. In young stage sporophyte of fern absorbs food from the prothallus through:

 
 
 
 

603. Pollination drop is:

 
 
 
 

604. On the basis of distribution of algal component in the thallus, lichens are classified as :

 
 
 
 

605. Rhizopus and yeast are usually:

 
 
 
 

606. Soil fertility is lost by the activities of:

 
 
 
 

607. Lichens reproduce by :

 
 
 
 

608. The vascular bundles of Cycas stem are :

 
 
 
 

609. Which of the following organism has characters of both animals and plants?

 
 
 
 

610. Who is known as ‘Father of Taxonomy’?

 
 
 
 

611. Which is the correct statement about Selaginella?

 
 
 
 

612. Funaria are commonly found :

 
 
 
 

613. The fact that best supports the concept that viruses are living is that viruses:

 
 
 
 

614. Meristele of fern is:

 
 
 
 

615. The penicillin family of antibiotics is used primarily against:

 
 
 
 

616. Viruses have:

 
 
 
 

617. Classification system proposed by Linnaeus was artificial because:

 
 
 
 

618. A plant bears fruit, has a column of vascular bundle and a tap root system. This plant is a :

 
 
 
 

619. The biological term used to describe two organisms living together and beneficial to each other is:

 
 
 
 

620. In Funaria :

 
 
 
 

621. Funaria is :

 
 
 
 

622. Unicellular eukaryotic organisms are placed in the kingdom:

 
 
 
 

623. Roots are absent in :

 
 
 
 

624. Absorptive nutrition is:

 
 
 
 

625. Protozoans are considered animals because these are:

 
 
 
 

626. To which country Antony van Leeuwenhoek belong?

 
 
 
 

627. Yeast belongs to class:

 
 
 
 

628. Clostridium can:

 
 
 
 

629. Which disease is caused by the bacterium Treponema pallidum?

 
 
 
 

630. The smut mycelium which initiates the infection is usually :

 
 
 
 

631. Cyanophage is a virus that attacks:

 
 
 
 

632. Which of the following is a parasitic algae?

 
 
 
 

633. The sporangiophores in Rhizopus are:

 
 
 
 

634. Photosynthetic bacteria have:

 
 
 
 

635. Members of the genera Azotobacter and Rhizobium are important because they:

 
 
 
 

636. There are some dead and corky areas with definite margins on the stem, branches and fruits of lemon. This disease should be :

 
 
 
 

637. The prothallus of fern represents the plant:

 
 
 
 

638. The megasporangium of Selaginella is:

 
 
 
 

639. Late blight of potato is caused by :

 
 
 
 

640. In Gymnosperms endosperm is a:

 
 
 
 

641. The chloroplast of Chlamydomonas are:

 
 
 
 

642. In bacterial photosynthesis, which functions as reductant of CO₂ is:

 
 
 
 

643. An alga which is rich in proteins:

 
 
 
 

644. The similarity between cyanobacteria and bacteria:

 
 
 
 

645. The word “sea weeds” is used for:

 
 
 
 

646. Gymnosperms could also be called as:

 
 
 
 

647. In order to label the coat alone but not the nucleic acid the bacteriophage should be grown on E. coli cells previously cultured on a medium containing:

 
 
 
 

648. The truncated cone of HIV consists of:

 
 
 
 

649. The estimated length of DNA molecule in E. coli is:

 
 
 
 

650. Which bacteria convert NO₃ to elemental nitrogen?

 
 
 
 

651. Pneumonia is caused by:

 
 
 
 

652. Which part of Riccia bears nurse cells?

 
 
 
 

653. What are plasmids?

 
 
 
 

654. ‘Red snow’ is caused by which of the following in alpine region?

 
 
 
 

655. Transfusion tissue is present in the leaflet of:

 
 
 
 

656. The gametophyte produced by apospory is :

 
 
 
 

657. Viruses are commonly transmitted in plants through:

 
 
 
 

658. First animal pathogenic virus was discovered by:

 
 
 
 

659. Citrus canker is caused by :

 
 
 
 

660. Those bacteria believed to have lived during the earliest years of the Earth belong to the group:

 
 
 
 

661. The chloroplast in Ulothrix is :

 
 
 
 

662. Bacteria are found everywhere, except:

 
 
 
 

663. Endemic plants are characterised by their:

 
 
 
 

664. Sporophyte of Funaria is :

 
 
 
 

665. Zoogametes are not found in:

 
 
 
 

666. Mycoplasma are sensitive to:

 
 
 
 

667. A group of plants with similar characteristics of any rank is termed:

 
 
 
 

668. Which lichen is called Reindeer moss?

 
 
 
 

669. An excessive enlargement of diseased organ because of increase in the number of cells is called :

 
 
 
 

670. One of the algae can be used as food in the space flight. It is :

 
 
 
 

671. Which of the following is not a fungal disease?

 
 
 
 

672. Botulinum toxin effects:

 
 
 
 

673. To which class Riccia belongs :

 
 
 
 

674. Certain enzymes like reverse transcriptase, integrase and protease are found in:

 
 
 
 

675. Sometimes a ladder-like structure is exhibited in Spirogyra due to :

 
 
 
 

676. Which of the following is sago palm?

 
 
 
 

677. Which of the following is a heterosporous pteridophyte?

 
 
 
 

678. Small epidermal swellings due to infection are called :

 
 
 
 

679. In the sub genus Heterophyllum of genus Selaginella the leaves are present in:

 
 
 
 

680. If moss protonema is formed from capsule cells it will be :

 
 
 
 

681. Seeds are characteristically found in :

 
 
 
 

682. The phloem of vascular system of Cycas is :

 
 
 
 

683. Which is a fungicide?

 
 
 
 

684. Which of the following can be said to be the precursor of seed-bearing plants?

 
 
 
 

685. Early blight of potato is caused by:

 
 
 
 

686. The disease occurring more or less regularly from year to year in a particular locality is referred to as :

 
 
 
 

687. Red rot of sugarcane is caused by :

 
 
 
 

688. Certain bacteria are able to thrive under extreme environmental conditions such as the absence of oxygen, high salt concentration, high temperature, or highly acidic environment What are these bacteria called?

 
 
 
 

689. Which of the following is correct regarding AIDS causative agent HIV? (NEET 2016)

 
 
 
 

690. All the following human diseases are caused by spirochetes except:

 
 
 
 

691. The young leaves of Cycas have :

 
 
 
 

692. Saccharomyces is well known for:

 
 
 
 

693. Saccharomyces is used in:

 
 
 
 

694. The lambda phase is a:

 
 
 
 

695. Detailed study of bacteriophage was made by:

 
 
 
 

696. Agar-agar, a common substance used in research is obtained from :

 
 
 
 

697. Which of the following is true for viruses?

 
 
 
 

698. The DNA of E coli is:

 
 
 
 

699. At least two billion years, nearly half the age of Earth, the only organisms that existed were:

 
 
 
 

700. Who named prion?

 
 
 
 

701. A plant bears fruit, has a column of vascular bundle and a tap root system. This plant is a:

 
 
 
 

702. Broad spectrum antibiotic is, which:

 
 
 
 

703. Which of the following have algal zone?

 
 
 
 

704. Quarantine regulations are concerned with:

 
 
 
 

705. Which one of the following temperatures would most likely kill a mesophile?

 
 
 
 

706. Which of the following are included in Tracheophyta?

 
 
 
 

707. Coenogamete is found in:

 
 
 
 

708. Which of the following statements is not correct?

 
 
 
 

709. John Hutchinson, who was associated with Royal Botanical Garden, Kew, England, initially gave his system of classification in:

 
 
 
 

710. Which is the hydrogen donor in the bacterial photosynthesis?

 
 
 
 

711. Fruits are not found in :

 
 
 
 

712. Waksman was awarded Nobel Prize for the discovery of:

 
 
 
 

713. Under certain circumstances, a generating cell forms aplanospores from mucilaginous mass, which encloses numerous small but uninucleated bodies; this is known as :

 
 
 
 

714. Diploxylic vascular bundles are found in:

 
 
 
 

715. The gametophyte of moss has distinct phases :

 
 
 
 

716. The source of litmus is :

 
 
 
 

717. Which of the following is a monocot?

 
 
 
 

718. Disease-resistant plant varieties can be produced by:

 
 
 
 

719. In moss, sporogenous tissue arises from:

 
 
 
 

720. The thread-like body of Nostoc filament without mucilage sheath is called :

 
 
 
 

721. Some of the species of Selaginella are commonly called:

 
 
 
 

722. Reserve food in Euglena is:

 
 
 
 

723. Cycas has two cotyledons but even then it is not classified as a dicot:

 
 
 
 

724. Embryo formation is not known in :

 
 
 
 

725. The mature ligule has a prominent basal portion called:

 
 
 
 

726. Mostly type of zygospore in Ulothrix is:

 
 
 
 

727. Cycas is different from mango in :

 
 
 
 

728. Which causes red tide?

 
 
 
 

729. Penicillin is obtained from:

 
 
 
 

730. Those bacteria designated microaerophilic are distinguished by their ability to grow:

 
 
 
 

731. Which is absent from the xylem of Cycas?

 
 
 
 

732. The sporophyte of Riccia is represented by :

 
 
 
 

733. The number of neck canal cells in archegonium of Selaginella is:

 
 
 
 

734. Ovary is absent in :

 
 
 
 

735. Which condition is found in Cycas?

 
 
 
 

736. The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals include the:

 
 
 
 

737. Amoeba is a member of the phylum:

 
 
 
 

738. A lichen having a branching form and growing either prostrate or erect on the ground is called :

 
 
 
 

739. Ulothrix produces :

 
 
 
 

740. In binomial system most of the words are:

 
 
 
 

741. Fern plants are:

 
 
 
 

742. Rhizophore of Selaginella is:

 
 
 
 

743. A structure in lichen that is similar to stomata in function is :

 
 
 
 

744. In which of the following, RNA is the genetic material?

 
 
 
 

745. Which type of sexual reproduction is found in Volvox?

 
 
 
 

746. The microsporophyll of Selaginella are the forerunners of which structure of Angiosperms?

 
 
 
 

747. The heart-shaped prothallus of Dryopteris is always:

 
 
 
 

748. India possesses wide biodiversity of flora and fauna. It is mainly due to its:

 
 
 
 

749. Rice, pea, potato are :

 
 
 
 

750. Some bacteria cannot be killed easily because of:

 
 
 
 

751. Redness of red sea is due to :

 
 
 
 

752. The cortex cells of the young ‘stem’ or axis of Funaria are :

 
 
 
 

753. The life cycle of Saccharomyces ludwigii represents a typical type of life cycle:

 
 
 
 

754. Green plants are classified as:

 
 
 
 

755. Red rot of sugarcane is caused by:

 
 
 
 

756. The main characteristic that distinguishes a Spirogyra cell from a Ulothrix cell is :

 
 
 
 

757. The leaf of Cycas shows:

 
 
 
 

758. The inability of a plant to resist the effects of a pathogen or any other damaging factors is known as :

 
 
 
 

759. Number of capsomeres forming capsid of TMV is:

 
 
 
 

760. Which is an exception to cell theory?

 
 
 
 

761. The parasitic fungi take their nutrition from their host with the help of:

 
 
 
 

762. Most resistant spore in bacteria is:

 
 
 
 

763. Rhizopus belongs to:

 
 
 
 

764. Cycas is :

 
 
 
 

765. Green plants are classified as :

 
 
 
 

766. What is mycorrhiza?

 
 
 
 

767. Dicot leaf-like reticulate venation occurs in leaves of:

 
 
 
 

768. The archegonia of Selaginella are differentiated by:

 
 
 
 

769. Blue-green algae, which live as endozoic in protozoans are called :

 
 
 
 

770. The root nodules of leguminous plants contain:

 
 
 
 

771. Some of the species of Selaginella perennate by means of:

 
 
 
 

772. Simple polyembryony is found in :

 
 
 
 

773. The bacteria that cause tetanus can be killed only by prolonged heating at temperatures considerably above boiling. This suggests that tetanus bacteria:

 
 
 
 

774. The plants with soft and delicate stems, about a meter tall are known as :

 
 
 
 

775. The spores which are formed in the sporangium of Rhizopus are:

 
 
 
 

776. Circular DNA is seen in:

 
 
 
 

777. Distinction between prokaryotes and eukaryotes is mainly based on:

 
 
 
 

778. Propagating materials like seeds, tubers, grafts and bulbs can be kept free of pathogens by :

 
 
 
 

779. Cryptogams include :

 
 
 
 

780. Viroids have:

 
 
 
 

781. In Herpes virus DNA is:

 
 
 
 

782. Fern prothallus produces:

 
 
 
 

783. Desired type of Cycas can be grown by:

 
 
 
 

784. Fruiting body of lichens is :

 
 
 
 

785. A plasmid found in some bacteria can integrate reversibly with the chromosome of its host and then it behaves as part of the host chromosome, multiplying with it What is this plasmid known as?

 
 
 
 

786. Most primitive embryophytes are placed in :

 
 
 
 

787. Borrelia burgdorferi is noted for its ability to cause:

 
 
 
 

788. Evidence in support of root-like nature of Selaginella rhizophore is:

 
 
 
 

789. Most of the members of the genus Bacillus are known for:

 
 
 
 

790. Bacteriophages have been used as:

 
 
 
 

791. Which of the following are included in Tracheophyta?

 
 
 
 

792. A disease is an abnormal state that may result due to:

 
 
 
 

793. In Funaria, the leaves are arranged on the axis:

 
 
 
 

794. The process of transformation in bacteria does not require:

 
 
 
 

795. Sweet scented lichen thalli used for making soaps, cosmetics are :

 
 
 
 

796. The protonema which is not formed from spores is known as :

 
 
 
 

797. The scientist who created the group Protista for both unicellular plants and animals, was:

 
 
 
 

798. What is the position of neck canal cells in Pinus?

 
 
 
 

799. The development of Selaginella embryo is:

 
 
 
 

800. Yeast is a source of:

 
 
 
 

801. Which is not found in bacteria?

 
 
 
 

802. Heterosporous pteridophytes always form:

 
 
 
 

803. An excessive enlargement of diseased organ because of increase in the number of cells is called:

 
 
 
 

804. Reproduction in Cycas takes place by :

 
 
 
 

805. The smallest bacterium is:

 
 
 
 

806. The largest alga is:

 
 
 
 

807. The prothallus of fern is:

 
 
 
 

808. Genetic material of TMV is:

 
 
 
 

809. The alga, Spirogyra are found in :

 
 
 
 

810. The reserve food in yeast is in the form of:

 
 
 
 

811. Which group of plants is called “Amphibians of Plant World”?

 
 
 
 

812. Bacteria are considered to be plants because they:

 
 
 
 

813. Infective part of virus was discovered by:

 
 
 
 

814. Cyathia is characterized by:

 
 
 
 

815. Gametophyte is the main plant body in :

 
 
 
 

816. Master-slave relationship between fungi and algae in the lichens is called :

 
 
 
 

817. Mycoplasma was discovered by:

 
 
 
 

818. Which of the following diseases are caused by Mycoplasma?

 
 
 
 

819. Green plants without root, stem and leaves, but with a simple usually filamentous plant body are called:

 
 
 
 

820. Polystelic condition is found in:

 
 
 
 

821. The antibiotic is obtained from:

 
 
 
 

822. The chief function of the indusium of the fern is:

 
 
 
 

823. Fruits are not found in:

 
 
 
 

824. Vascular tissue is found in :

 
 
 
 

825. Characters drawn from flowers are mainly used as basis for classification in seed plants because:

 
 
 
 

826. Bacteria species of Thiobacillus and Beggiatoa play an important role in the:

 
 
 
 

827. The disease apple scab is caused by:

 
 
 
 

828. The flagella of Chlamydomonas are:

 
 
 
 

829. The megaspore of Selaginella on germination produces:

 
 
 
 

830. The fern plant is:

 
 
 
 

831. All but one group are included in tracheophyta; which group is this?

 
 
 
 

832. Members of the genus Streptococcus are responsible for cases of:

 
 
 
 

833. In angiosperms double fertilization represents:

 
 
 
 

834. Oswald Tippo’s classification is:

 
 
 
 

835. Cyanobacteria, unlike other types of bacteria that photosynthesize and:

 
 
 
 

836. Sometimes the bacterial cell is enclosed in:

 
 
 
 

837. The smallest known agent of a plant disease is:

 
 
 
 

838. The teeth of peristome of Funaria are :

 
 
 
 

839. The sex organs that develop amongst the rhizoids of fern prothallus are:

 
 
 
 

840. Bacteria were first discovered by:

 
 
 
 

841. Embryophyta includes:

 
 
 
 

842. Pythium debaryanum is the causative agent of:

 
 
 
 

843. The stem of adult Cycas plant is covered with persistent leaf-bases which are :

 
 
 
 

844. Smut of maize is caused by :

 
 
 
 

845. Name the scientist who called viruses as “Contagium vivum fluidum”:

 
 
 
 

846. The stem and petiole are covered with numerous brownish scale-like structures which are called:

 
 
 
 

847. The orders generally have the uniform endings:

 
 
 
 

848. The central part of Funaria axis is :

 
 
 
 

849. Economic importance of bacteria lies in their being:

 
 
 
 

850. The Rhizopus gametes are formed in:

 
 
 
 

851. The label of a herbarium sheet does not carry information of:

 
 
 
 

852. Smallpox is caused by:

 
 
 
 

853. What is a vector?

 
 
 
 

854. The specific genes found on the plasmids of E coli are:

 
 
 
 

855. Which functions as hydrogen donor in photosynthetic green sulfur bacteria?

 
 
 
 

856. Severe famine of West Bengal of 1942-43 was due to destruction of rice crop by a fungus called :

 
 
 
 

857. E coli is a:

 
 
 
 

858. The sori in Dryopteris are found on:

 
 
 
 

859. In moss, conducting tissue is made up of

 
 
 
 

860. Chemosynthetic bacteria are:

 
 
 
 

861. Rhizoids of Riccia are :

 
 
 
 

862. Chemoautotrophic bacteria are bacteria that derive their energy from chemical reactions and:

 
 
 
 

863. In Pteris, the sporophytic generation begins from and ends with the formation of spore mother cells:

 
 
 
 

864. Fern prothallus is: