Quiz_Monera

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

 
 
 
 

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

 
 
 
 

3. Pneumonia is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

6. Some diseases caused by bacteria are:

 
 
 
 

7. Wine turns sour because of:

 
 
 
 

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

 
 
 
 

9. The antibiotic is obtained from:

 
 
 
 

10. Some bacteria cannot be killed easily because of:

 
 
 
 

11. Little leaf disease of Brinjal is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

14. Which bacteria convert nitrate into nitrogen?

 
 
 
 

15. Gram stain is used to:

 
 
 
 

16. To which country Antony van Leeuwenhoek belong?

 
 
 
 

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

 
 
 
 

18. Commonest mode of asexual reproduction in bacteria is:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

21. Which of the following are absent in Mycoplasma?

 
 
 
 

22. Mycoplasmas are not viruses in nature because:

 
 
 
 

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

 
 
 
 

24. Enteric bacteria are those bacteria that live:

 
 
 
 

25. Pasteurized milk is:

 
 
 
 

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

 
 
 
 

27. Select the wrong statement:

 
 
 
 

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

 
 
 
 

29. What are plasmids?

 
 
 
 

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

 
 
 
 

31. Streptomyces falls under:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

34. The nucleus of bacteria is:

 
 
 
 

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

 
 
 
 

36. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

40. Economic importance of bacteria lies in their being:

 
 
 
 

41. Mycoplasma contains:

 
 
 
 

42. Most resistant spore in bacteria is:

 
 
 
 

43. 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:

 
 
 
 

44. Methanogens belong to:

 
 
 
 

45. The largest known bacterium is:

 
 
 
 

46. Bacteria are considered to be plants because they:

 
 
 
 

47. 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?

 
 
 
 

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

 
 
 
 

49. 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:

 
 
 
 

50. Soil fertility is lost by the activities of:

 
 
 
 

51. Antibiotics cure the disease by:

 
 
 
 

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

 
 
 
 

53. Mycoplasma is different from bacteria due to:

 
 
 
 

54. Which is not found in bacteria?

 
 
 
 

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

 
 
 
 

56. The smallest bacterium is:

 
 
 
 

57. 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:

 
 
 
 

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

 
 
 
 

59. Cell walls of Gram-positive bacteria contain:

 
 
 
 

60. Mycoplasma was discovered by:

 
 
 
 

61. Halophiles are the bacteria that require for growth:

 
 
 
 

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

 
 
 
 

63. The mode of nutrition of bacteria is usually:

 
 
 
 

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

 
 
 
 

65. Plasmids are:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

68. Water-borne bacterial diseases are:

 
 
 
 

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

 
 
 
 

70. Circular DNA is seen in:

 
 
 
 

71. Diphtheria is caused by:

 
 
 
 

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

 
 
 
 

73. Usually, bacteria reproduce by:

 
 
 
 

74. Leprosy is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

77. Chemosynthetic bacteria are:

 
 
 
 

78. Clostridium can:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

81. Germ theory of disease was proposed by:

 
 
 
 

82. An Hfr bacterium is one that contains:

 
 
 
 

83. Bacteriovirdin pigments are found in which bacteria:

 
 
 
 

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

 
 
 
 

85. All archaebacteria lack:

 
 
 
 

86. Botulinum toxin effects:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

89. Which organisms are the oldest life forms?

 
 
 
 

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

 
 
 
 

91. Botulism is a:

 
 
 
 

92. Which of the following converts CO_ into carbohydrates?

 
 
 
 

93. In nitrification, Nitrosomonas bacteria converts:

 
 
 
 

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

 
 
 
 

95. Typhoid in man is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

98. 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?

 
 
 
 

99. Bacteria were first discovered by:

 
 
 
 

100. The DNA of E coli is:

 
 
 
 

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

 
 
 
 

102. Chemosynthetic bacteria are:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

105. Broad spectrum antibiotic is, which:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

109. Citrus canker is caused by:

 
 
 
 

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

 
 
 
 

111. Which statement is wrong in regard to bacteria?

 
 
 
 

112. Ethylene oxide is widely used to:

 
 
 
 

113. Bacteria are found everywhere, except:

 
 
 
 

114. The root nodules of leguminous plants contain:

 
 
 
 

115. Fertility of the soil is increased by:

 
 
 
 

116. Photosynthetic bacteria have:

 
 
 
 

117. The similarity between cyanobacteria and bacteria:

 
 
 
 

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

 
 
 
 

119. E coli is a:

 
 
 
 

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

 
 
 
 

121. Mycoplasma are:

 
 
 
 

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

 
 
 
 

123. Nitrifying bacteria play an important role by converting:

 
 
 
 

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

 
 
 
 

125. Cocci types of bacteria are:

 
 
 
 

126. Triple antigen injection or vaccine are for:

 
 
 
 

127. Which is the nuclear material in bacteria?

 
 
 
 

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

 
 
 
 

129. Which is not true for Escherichia coli?

 
 
 
 

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

 
 
 
 

131. What is the role of nitrifying bacteria?

 
 
 
 

132. Mycoplasma are sensitive to:

 
 
 
 

133. Pasteur is famous for his:

 
 
 
 

134. Nitrogen-fixing bacteria may be located:

 
 
 
 

135. Which of the following statement is correct?

 
 
 
 

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

 
 
 
 

137. Azotobacter and Beijerinckia are the examples of:

 
 
 
 

138. Which bacteria convert NO_ to elemental nitrogen?

 
 
 
 

139. Milk is converted to curd by:

 
 
 
 

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

 
 
 
 

141. Bacteria are placed under:

 
 
 
 

142. Bacteria which are spherical are called:

 
 
 
 

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

 
 
 
 

144. Acetobacter is useful in:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

147. 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:

 
 
 
 

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

 
 
 
 

149. Photoautotrophic bacteria have:

 
 
 
 

150. 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?

 
 
 
 

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

 
 
 
 

152. Streptomycin is obtained from:

 
 
 
 

153. Bacteria growing on synthetic medium are called:

 
 
 
 

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

 
 
 
 

155. Sometimes the bacterial cell is enclosed in:

 
 
 
 

156. Chemoautotrophic nitrifying bacteria are: