Quiz_Monera

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

 
 
 
 

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

 
 
 
 

3. Which is not true for Escherichia coli?

 
 
 
 

4. 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?

 
 
 
 

5. Bacteria are placed under:

 
 
 
 

6. Photoautotrophic bacteria have:

 
 
 
 

7. Some bacteria cannot be killed easily because of:

 
 
 
 

8. Streptomyces falls under:

 
 
 
 

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

 
 
 
 

10. Nitrifying bacteria play an important role by converting:

 
 
 
 

11. Which of the following are absent in Mycoplasma?

 
 
 
 

12. Mycoplasma is different from bacteria due to:

 
 
 
 

13. 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:

 
 
 
 

14. All archaebacteria lack:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

17. Bacteria are found everywhere, except:

 
 
 
 

18. The root nodules of leguminous plants contain:

 
 
 
 

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

 
 
 
 

20. The nucleus of bacteria is:

 
 
 
 

21. Bacteriovirdin pigments are found in which bacteria:

 
 
 
 

22. Streptomycin is obtained from:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

27. Sometimes the bacterial cell is enclosed in:

 
 
 
 

28. Mycoplasma are:

 
 
 
 

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

 
 
 
 

30. Leprosy is caused by:

 
 
 
 

31. Chemoautotrophic nitrifying bacteria are:

 
 
 
 

32. Economic importance of bacteria lies in their being:

 
 
 
 

33. Which bacteria convert NO_ to elemental nitrogen?

 
 
 
 

34. Broad spectrum antibiotic is, which:

 
 
 
 

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

 
 
 
 

36. Most resistant spore in bacteria is:

 
 
 
 

37. Mycoplasmas are not viruses in nature because:

 
 
 
 

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

 
 
 
 

39. Chemosynthetic bacteria are:

 
 
 
 

40. Germ theory of disease was proposed by:

 
 
 
 

41. Acetobacter is useful in:

 
 
 
 

42. To which country Antony van Leeuwenhoek belong?

 
 
 
 

43. Antibiotics cure the disease by:

 
 
 
 

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

 
 
 
 

45. Little leaf disease of Brinjal is caused by:

 
 
 
 

46. The largest known bacterium is:

 
 
 
 

47. Azotobacter and Beijerinckia are the examples of:

 
 
 
 

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

 
 
 
 

49. 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:

 
 
 
 

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

 
 
 
 

51. Clostridium can:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

54. Typhoid in man is caused by:

 
 
 
 

55. Mycoplasma are sensitive to:

 
 
 
 

56. Usually, bacteria reproduce by:

 
 
 
 

57. Halophiles are the bacteria that require for growth:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

61. Some diseases caused by bacteria are:

 
 
 
 

62. Pasteurized milk is:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

65. Botulinum toxin effects:

 
 
 
 

66. Which of the following statement is correct?

 
 
 
 

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

 
 
 
 

68. The similarity between cyanobacteria and bacteria:

 
 
 
 

69. Select the wrong statement:

 
 
 
 

70. E coli is a:

 
 
 
 

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

 
 
 
 

72. Enteric bacteria are those bacteria that live:

 
 
 
 

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

 
 
 
 

74. Photosynthetic bacteria have:

 
 
 
 

75. Mycoplasma was discovered by:

 
 
 
 

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

 
 
 
 

77. The mode of nutrition of bacteria is usually:

 
 
 
 

78. Milk is converted to curd by:

 
 
 
 

79. Soil fertility is lost by the activities of:

 
 
 
 

80. Wine turns sour because of:

 
 
 
 

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

 
 
 
 

82. Commonest mode of asexual reproduction in bacteria is:

 
 
 
 

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

 
 
 
 

84. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

88. Which bacteria convert nitrate into nitrogen?

 
 
 
 

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

 
 
 
 

90. What is the role of nitrifying bacteria?

 
 
 
 

91. 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?

 
 
 
 

92. Cell walls of Gram-positive bacteria contain:

 
 
 
 

93. Bacteria are considered to be plants because they:

 
 
 
 

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

 
 
 
 

95. Mycoplasma contains:

 
 
 
 

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

 
 
 
 

97. Triple antigen injection or vaccine are for:

 
 
 
 

98. Which organisms are the oldest life forms?

 
 
 
 

99. Pasteur is famous for his:

 
 
 
 

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

 
 
 
 

101. Citrus canker is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

104. The smallest bacterium is:

 
 
 
 

105. The DNA of E coli is:

 
 
 
 

106. 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?

 
 
 
 

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

 
 
 
 

108. What are plasmids?

 
 
 
 

109. Botulism is a:

 
 
 
 

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

 
 
 
 

111. In bacterial photosynthesis, which functions as reductant of CO_ is:

 
 
 
 

112. Methanogens belong to:

 
 
 
 

113. Which of the following converts CO_ into carbohydrates?

 
 
 
 

114. 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:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

117. Bacteria growing on synthetic medium are called:

 
 
 
 

118. An Hfr bacterium is one that contains:

 
 
 
 

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

 
 
 
 

120. Ethylene oxide is widely used to:

 
 
 
 

121. Water-borne bacterial diseases are:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

125. Bacteria which are spherical are called:

 
 
 
 

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

 
 
 
 

127. Nitrogen-fixing bacteria may be located:

 
 
 
 

128. Which statement is wrong in regard to bacteria?

 
 
 
 

129. Bacteria were first discovered by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

133. The antibiotic is obtained from:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

136. Pneumonia is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

139. 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:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

142. Diphtheria is caused by:

 
 
 
 

143. Gram stain is used to:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

146. In nitrification, Nitrosomonas bacteria converts:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

149. Plasmids are:

 
 
 
 

150. Fertility of the soil is increased by:

 
 
 
 

151. Which is the nuclear material in bacteria?

 
 
 
 

152. Which is not found in bacteria?

 
 
 
 

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

 
 
 
 

154. Circular DNA is seen in:

 
 
 
 

155. Chemosynthetic bacteria are:

 
 
 
 

156. Cocci types of bacteria are: