Quiz_Monera

1. Usually, bacteria reproduce by:

 
 
 
 

2. Bacteria are found everywhere, except:

 
 
 
 

3. 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:

 
 
 
 

4. Milk is converted to curd by:

 
 
 
 

5. Bacteria were first discovered by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

8. Halophiles are the bacteria that require for growth:

 
 
 
 

9. E coli is a:

 
 
 
 

10. Streptomyces falls under:

 
 
 
 

11. Water-borne bacterial diseases are:

 
 
 
 

12. Which bacteria convert NO_ to elemental nitrogen?

 
 
 
 

13. 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?

 
 
 
 

14. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

18. 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?

 
 
 
 

19. Antibiotics cure the disease by:

 
 
 
 

20. Mycoplasma are sensitive to:

 
 
 
 

21. Which is the nuclear material in bacteria?

 
 
 
 

22. Botulinum toxin effects:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

26. The smallest bacterium is:

 
 
 
 

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

 
 
 
 

28. The root nodules of leguminous plants contain:

 
 
 
 

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

 
 
 
 

30. The antibiotic is obtained from:

 
 
 
 

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

 
 
 
 

32. Mycoplasma was discovered by:

 
 
 
 

33. Botulism is a:

 
 
 
 

34. Diphtheria is caused by:

 
 
 
 

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

 
 
 
 

36. What are plasmids?

 
 
 
 

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

 
 
 
 

38. Fertility of the soil is increased by:

 
 
 
 

39. Cell walls of Gram-positive bacteria contain:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

42. Circular DNA is seen in:

 
 
 
 

43. Which statement is wrong in regard to bacteria?

 
 
 
 

44. Germ theory of disease was proposed by:

 
 
 
 

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

 
 
 
 

46. To which country Antony van Leeuwenhoek belong?

 
 
 
 

47. Broad spectrum antibiotic is, which:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

50. The DNA of E coli is:

 
 
 
 

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

 
 
 
 

52. Bacteria are placed under:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

55. Wine turns sour because of:

 
 
 
 

56. Methanogens belong to:

 
 
 
 

57. Leprosy is caused by:

 
 
 
 

58. 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:

 
 
 
 

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

 
 
 
 

60. What is the role of nitrifying bacteria?

 
 
 
 

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

 
 
 
 

62. Which of the following statement is correct?

 
 
 
 

63. Citrus canker is caused by:

 
 
 
 

64. Some bacteria cannot be killed easily because of:

 
 
 
 

65. Select the wrong statement:

 
 
 
 

66. The nucleus of bacteria is:

 
 
 
 

67. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

73. Economic importance of bacteria lies in their being:

 
 
 
 

74. Which bacteria convert nitrate into nitrogen?

 
 
 
 

75. Which is not found in bacteria?

 
 
 
 

76. Acetobacter is useful in:

 
 
 
 

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

 
 
 
 

78. Pasteurized milk is:

 
 
 
 

79. Enteric bacteria are those bacteria that live:

 
 
 
 

80. Chemoautotrophic nitrifying bacteria are:

 
 
 
 

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

 
 
 
 

82. Nitrogen-fixing bacteria may be located:

 
 
 
 

83. Bacteria which are spherical are called:

 
 
 
 

84. Which is not true for Escherichia coli?

 
 
 
 

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

 
 
 
 

86. Commonest mode of asexual reproduction in bacteria is:

 
 
 
 

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

 
 
 
 

88. The similarity between cyanobacteria and bacteria:

 
 
 
 

89. The mode of nutrition of bacteria is usually:

 
 
 
 

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

 
 
 
 

91. Which of the following converts CO_ into carbohydrates?

 
 
 
 

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

 
 
 
 

93. Clostridium can:

 
 
 
 

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

 
 
 
 

95. Soil fertility is lost by the activities of:

 
 
 
 

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

 
 
 
 

97. Which of the following are absent in Mycoplasma?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

101. Streptomycin is obtained from:

 
 
 
 

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

 
 
 
 

103. 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:

 
 
 
 

104. All archaebacteria lack:

 
 
 
 

105. Pasteur is famous for his:

 
 
 
 

106. Most resistant spore in bacteria is:

 
 
 
 

107. Pneumonia is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

110. Bacteriovirdin pigments are found in which bacteria:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

113. 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:

 
 
 
 

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

 
 
 
 

115. Photoautotrophic bacteria have:

 
 
 
 

116. Triple antigen injection or vaccine are for:

 
 
 
 

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

 
 
 
 

118. Gram stain is used to:

 
 
 
 

119. Which organisms are the oldest life forms?

 
 
 
 

120. Nitrifying bacteria play an important role by converting:

 
 
 
 

121. Mycoplasma are:

 
 
 
 

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

 
 
 
 

123. Typhoid in man is caused by:

 
 
 
 

124. Chemosynthetic bacteria are:

 
 
 
 

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

 
 
 
 

126. An Hfr bacterium is one that contains:

 
 
 
 

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

 
 
 
 

128. Photosynthetic bacteria have:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

134. Mycoplasma contains:

 
 
 
 

135. Sometimes the bacterial cell is enclosed in:

 
 
 
 

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

 
 
 
 

137. Plasmids are:

 
 
 
 

138. Little leaf disease of Brinjal is caused by:

 
 
 
 

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

 
 
 
 

140. Cocci types of bacteria are:

 
 
 
 

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

 
 
 
 

142. Azotobacter and Beijerinckia are the examples of:

 
 
 
 

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

 
 
 
 

144. The largest known bacterium is:

 
 
 
 

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

 
 
 
 

146. Some diseases caused by bacteria are:

 
 
 
 

147. In nitrification, Nitrosomonas bacteria converts:

 
 
 
 

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

 
 
 
 

149. Bacteria are considered to be plants because they:

 
 
 
 

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

 
 
 
 

151. Mycoplasma is different from bacteria due to:

 
 
 
 

152. Mycoplasmas are not viruses in nature because:

 
 
 
 

153. Bacteria growing on synthetic medium are called:

 
 
 
 

154. Chemosynthetic bacteria are:

 
 
 
 

155. Ethylene oxide is widely used to:

 
 
 
 

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