Quiz_Monera

1. Sometimes the bacterial cell is enclosed in:

 
 
 
 

2. Mycoplasma are sensitive to:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

6. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

9. Milk is converted to curd by:

 
 
 
 

10. Mycoplasma was discovered by:

 
 
 
 

11. Pneumonia is caused by:

 
 
 
 

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

 
 
 
 

13. Cell walls of Gram-positive bacteria contain:

 
 
 
 

14. 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:

 
 
 
 

15. Botulinum toxin effects:

 
 
 
 

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

 
 
 
 

17. Which of the following statement is correct?

 
 
 
 

18. Bacteria are placed under:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

22. Fertility of the soil is increased by:

 
 
 
 

23. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

26. Which of the following converts CO_ into carbohydrates?

 
 
 
 

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

 
 
 
 

28. Bacteria are considered to be plants because they:

 
 
 
 

29. Botulism is a:

 
 
 
 

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

 
 
 
 

31. Streptomyces falls under:

 
 
 
 

32. Antibiotics cure the disease by:

 
 
 
 

33. Diphtheria is caused by:

 
 
 
 

34. Some diseases caused by bacteria are:

 
 
 
 

35. All archaebacteria lack:

 
 
 
 

36. Germ theory of disease was proposed by:

 
 
 
 

37. 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?

 
 
 
 

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

 
 
 
 

39. The nucleus of bacteria is:

 
 
 
 

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

 
 
 
 

41. Economic importance of bacteria lies in their being:

 
 
 
 

42. Citrus canker is caused by:

 
 
 
 

43. Cocci types of bacteria are:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

47. Photoautotrophic bacteria have:

 
 
 
 

48. E coli is a:

 
 
 
 

49. The DNA of E coli is:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

52. Bacteria growing on synthetic medium are called:

 
 
 
 

53. Little leaf disease of Brinjal is caused by:

 
 
 
 

54. 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:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

58. Usually, bacteria reproduce by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

61. Most resistant spore in bacteria is:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

64. The antibiotic is obtained from:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

67. The smallest bacterium is:

 
 
 
 

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

 
 
 
 

69. Bacteria were first discovered by:

 
 
 
 

70. Chemosynthetic bacteria are:

 
 
 
 

71. Photosynthetic bacteria have:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

74. Which bacteria convert NO_ to elemental nitrogen?

 
 
 
 

75. Plasmids are:

 
 
 
 

76. Which is the nuclear material in bacteria?

 
 
 
 

77. Which organisms are the oldest life forms?

 
 
 
 

78. The largest known bacterium is:

 
 
 
 

79. Nitrogen-fixing bacteria may be located:

 
 
 
 

80. What are plasmids?

 
 
 
 

81. Typhoid in man is caused by:

 
 
 
 

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

 
 
 
 

83. Bacteria are found everywhere, except:

 
 
 
 

84. The mode of nutrition of bacteria is usually:

 
 
 
 

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

 
 
 
 

86. Mycoplasma contains:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

89. Water-borne bacterial diseases are:

 
 
 
 

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

 
 
 
 

91. Nitrifying bacteria play an important role by converting:

 
 
 
 

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

 
 
 
 

93. Soil fertility is lost by the activities of:

 
 
 
 

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

 
 
 
 

95. Methanogens belong to:

 
 
 
 

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

 
 
 
 

97. Bacteriovirdin pigments are found in which bacteria:

 
 
 
 

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

 
 
 
 

99. Chemoautotrophic nitrifying bacteria are:

 
 
 
 

100. Broad spectrum antibiotic is, which:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

103. 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:

 
 
 
 

104. Which is not found in bacteria?

 
 
 
 

105. What is the role of nitrifying bacteria?

 
 
 
 

106. Leprosy is caused by:

 
 
 
 

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

 
 
 
 

108. Circular DNA is seen in:

 
 
 
 

109. Some bacteria cannot be killed easily because of:

 
 
 
 

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

 
 
 
 

111. Which is not true for Escherichia coli?

 
 
 
 

112. To which country Antony van Leeuwenhoek belong?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

115. Wine turns sour because of:

 
 
 
 

116. Enteric bacteria are those bacteria that live:

 
 
 
 

117. In nitrification, Nitrosomonas bacteria converts:

 
 
 
 

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

 
 
 
 

119. The root nodules of leguminous plants contain:

 
 
 
 

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

 
 
 
 

121. Mycoplasma are:

 
 
 
 

122. Triple antigen injection or vaccine are for:

 
 
 
 

123. An Hfr bacterium is one that contains:

 
 
 
 

124. Acetobacter is useful in:

 
 
 
 

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

 
 
 
 

126. Mycoplasmas are not viruses in nature because:

 
 
 
 

127. Streptomycin is obtained from:

 
 
 
 

128. Select the wrong statement:

 
 
 
 

129. Clostridium can:

 
 
 
 

130. Mycoplasma is different from bacteria due to:

 
 
 
 

131. Azotobacter and Beijerinckia are the examples of:

 
 
 
 

132. Gram stain is used to:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

135. Which bacteria convert nitrate into nitrogen?

 
 
 
 

136. Commonest mode of asexual reproduction in bacteria is:

 
 
 
 

137. Pasteur is famous for his:

 
 
 
 

138. The similarity between cyanobacteria and bacteria:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

142. Bacteria which are spherical are called:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

146. Halophiles are the bacteria that require for growth:

 
 
 
 

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

 
 
 
 

148. 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:

 
 
 
 

149. 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?

 
 
 
 

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

 
 
 
 

151. Which statement is wrong in regard to bacteria?

 
 
 
 

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

 
 
 
 

153. Ethylene oxide is widely used to:

 
 
 
 

154. Chemosynthetic bacteria are:

 
 
 
 

155. Pasteurized milk is:

 
 
 
 

156. Which of the following are absent in Mycoplasma?