Quiz_Monera

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

 
 
 
 

2. The smallest bacterium is:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

5. Bacteria are placed under:

 
 
 
 

6. Clostridium can:

 
 
 
 

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

 
 
 
 

8. Wine turns sour because of:

 
 
 
 

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

 
 
 
 

10. Bacteria were first discovered by:

 
 
 
 

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

 
 
 
 

12. Azotobacter and Beijerinckia are the examples of:

 
 
 
 

13. Little leaf disease of Brinjal is caused by:

 
 
 
 

14. Milk is converted to curd by:

 
 
 
 

15. Cocci types of bacteria are:

 
 
 
 

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

 
 
 
 

17. Select the wrong statement:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

20. Streptomycin is obtained from:

 
 
 
 

21. Plasmids are:

 
 
 
 

22. Some diseases caused by bacteria are:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

29. 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?

 
 
 
 

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

 
 
 
 

31. The root nodules of leguminous plants contain:

 
 
 
 

32. Diphtheria is caused by:

 
 
 
 

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

 
 
 
 

34. Which statement is wrong in regard to bacteria?

 
 
 
 

35. Mycoplasma is different from bacteria due to:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

38. Photoautotrophic bacteria have:

 
 
 
 

39. The DNA of E coli is:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

43. Chemosynthetic bacteria are:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

46. 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?

 
 
 
 

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

 
 
 
 

48. Nitrogen-fixing bacteria may be located:

 
 
 
 

49. Usually, bacteria reproduce by:

 
 
 
 

50. Bacteria are found everywhere, except:

 
 
 
 

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

 
 
 
 

52. Streptomyces falls under:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

55. Pasteur is famous for his:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

58. Enteric bacteria are those bacteria that live:

 
 
 
 

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

 
 
 
 

60. Mycoplasma contains:

 
 
 
 

61. Sometimes the bacterial cell is enclosed in:

 
 
 
 

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

 
 
 
 

63. Cell walls of Gram-positive bacteria contain:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

66. E coli is a:

 
 
 
 

67. Antibiotics cure the disease by:

 
 
 
 

68. Chemosynthetic bacteria are:

 
 
 
 

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

 
 
 
 

70. Bacteriovirdin pigments are found in which bacteria:

 
 
 
 

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

 
 
 
 

72. Pasteurized milk is:

 
 
 
 

73. Nitrifying bacteria play an important role by converting:

 
 
 
 

74. Which of the following are absent in Mycoplasma?

 
 
 
 

75. Fertility of the soil is increased by:

 
 
 
 

76. Mycoplasma are sensitive to:

 
 
 
 

77. Which is not found in bacteria?

 
 
 
 

78. Mycoplasma are:

 
 
 
 

79. Which is not true for Escherichia coli?

 
 
 
 

80. Which of the following converts CO_ into carbohydrates?

 
 
 
 

81. Typhoid in man is caused by:

 
 
 
 

82. Some bacteria cannot be killed easily because of:

 
 
 
 

83. The similarity between cyanobacteria and bacteria:

 
 
 
 

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. Which bacteria convert nitrate into nitrogen?

 
 
 
 

86. Leprosy is caused by:

 
 
 
 

87. In nitrification, Nitrosomonas bacteria converts:

 
 
 
 

88. All archaebacteria lack:

 
 
 
 

89. Most resistant spore in bacteria is:

 
 
 
 

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

 
 
 
 

91. Which of the following statement is correct?

 
 
 
 

92. What are plasmids?

 
 
 
 

93. 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?

 
 
 
 

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

 
 
 
 

95. Bacteria are considered to be plants because they:

 
 
 
 

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

 
 
 
 

97. 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:

 
 
 
 

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

 
 
 
 

99. Acetobacter is useful in:

 
 
 
 

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

 
 
 
 

101. The mode of nutrition of bacteria is usually:

 
 
 
 

102. Ethylene oxide is widely used to:

 
 
 
 

103. 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:

 
 
 
 

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

 
 
 
 

105. Commonest mode of asexual reproduction in bacteria is:

 
 
 
 

106. The largest known bacterium is:

 
 
 
 

107. Economic importance of bacteria lies in their being:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

110. Citrus canker is caused by:

 
 
 
 

111. An Hfr bacterium is one that contains:

 
 
 
 

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

 
 
 
 

113. The nucleus of bacteria is:

 
 
 
 

114. Triple antigen injection or vaccine are for:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

117. Which is the nuclear material in bacteria?

 
 
 
 

118. Botulism is a:

 
 
 
 

119. Pneumonia is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

123. Circular DNA is seen in:

 
 
 
 

124. The antibiotic is obtained from:

 
 
 
 

125. Soil fertility is lost by the activities of:

 
 
 
 

126. Broad spectrum antibiotic is, which:

 
 
 
 

127. Which bacteria convert NO_ to elemental nitrogen?

 
 
 
 

128. Germ theory of disease was proposed by:

 
 
 
 

129. What is the role of nitrifying bacteria?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

132. Mycoplasma was discovered by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

135. Water-borne bacterial diseases are:

 
 
 
 

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

 
 
 
 

137. 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:

 
 
 
 

138. To which country Antony van Leeuwenhoek belong?

 
 
 
 

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

 
 
 
 

140. Bacteria growing on synthetic medium are called:

 
 
 
 

141. Botulinum toxin effects:

 
 
 
 

142. Bacteria which are spherical are called:

 
 
 
 

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

 
 
 
 

144. 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:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

148. Gram stain is used to:

 
 
 
 

149. Chemoautotrophic nitrifying bacteria are:

 
 
 
 

150. Methanogens belong to:

 
 
 
 

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

 
 
 
 

152. Halophiles are the bacteria that require for growth:

 
 
 
 

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

 
 
 
 

154. Which organisms are the oldest life forms?

 
 
 
 

155. Mycoplasmas are not viruses in nature because:

 
 
 
 

156. Photosynthetic bacteria have: