Quiz_Monera

1. Select the wrong statement:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

4. The similarity between cyanobacteria and bacteria:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

7. Circular DNA is seen in:

 
 
 
 

8. Antibiotics cure the disease by:

 
 
 
 

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

 
 
 
 

10. Most resistant spore in bacteria is:

 
 
 
 

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

 
 
 
 

12. 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:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

15. Azotobacter and Beijerinckia are the examples of:

 
 
 
 

16. Bacteria are placed under:

 
 
 
 

17. Streptomyces falls under:

 
 
 
 

18. Cell walls of Gram-positive bacteria contain:

 
 
 
 

19. Bacteriovirdin pigments are found in which bacteria:

 
 
 
 

20. What are plasmids?

 
 
 
 

21. Mycoplasma contains:

 
 
 
 

22. To which country Antony van Leeuwenhoek belong?

 
 
 
 

23. Milk is converted to curd by:

 
 
 
 

24. Water-borne bacterial diseases are:

 
 
 
 

25. 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:

 
 
 
 

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

 
 
 
 

27. Which is the nuclear material in bacteria?

 
 
 
 

28. Chemosynthetic bacteria are:

 
 
 
 

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

 
 
 
 

30. Cocci types of bacteria are:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

33. Leprosy is caused by:

 
 
 
 

34. Fertility of the soil is increased by:

 
 
 
 

35. Halophiles are the bacteria that require for growth:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

38. Acetobacter is useful in:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

41. Which statement is wrong in regard to bacteria?

 
 
 
 

42. Mycoplasma is different from bacteria due to:

 
 
 
 

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

 
 
 
 

44. The smallest bacterium is:

 
 
 
 

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

 
 
 
 

46. Botulinum toxin effects:

 
 
 
 

47. 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:

 
 
 
 

48. Mycoplasma are sensitive to:

 
 
 
 

49. Nitrogen-fixing bacteria may be located:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

52. Germ theory of disease was proposed by:

 
 
 
 

53. Bacteria growing on synthetic medium are called:

 
 
 
 

54. Commonest mode of asexual reproduction in bacteria is:

 
 
 
 

55. Soil fertility is lost by the activities of:

 
 
 
 

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

 
 
 
 

57. Economic importance of bacteria lies in their being:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

62. Broad spectrum antibiotic is, which:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

66. Photoautotrophic bacteria have:

 
 
 
 

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

 
 
 
 

68. Which of the following converts CO_ into carbohydrates?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

74. Which is not found in bacteria?

 
 
 
 

75. E coli is a:

 
 
 
 

76. The mode of nutrition of bacteria is usually:

 
 
 
 

77. What is the role of nitrifying bacteria?

 
 
 
 

78. Botulism is a:

 
 
 
 

79. Methanogens belong to:

 
 
 
 

80. 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?

 
 
 
 

81. Clostridium can:

 
 
 
 

82. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

86. Mycoplasmas are not viruses in nature because:

 
 
 
 

87. Some diseases caused by bacteria are:

 
 
 
 

88. The largest known bacterium is:

 
 
 
 

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

 
 
 
 

90. The root nodules of leguminous plants contain:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

93. Usually, bacteria reproduce by:

 
 
 
 

94. Photosynthetic bacteria have:

 
 
 
 

95. An Hfr bacterium is one that contains:

 
 
 
 

96. Pasteur is famous for his:

 
 
 
 

97. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

100. Mycoplasma was discovered by:

 
 
 
 

101. Nitrifying bacteria play an important role by converting:

 
 
 
 

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

 
 
 
 

103. Diphtheria is caused by:

 
 
 
 

104. Citrus canker is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

107. Pneumonia is caused by:

 
 
 
 

108. Which bacteria convert nitrate into nitrogen?

 
 
 
 

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

 
 
 
 

110. All archaebacteria lack:

 
 
 
 

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

 
 
 
 

112. Typhoid in man is caused by:

 
 
 
 

113. Bacteria are found everywhere, except:

 
 
 
 

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

 
 
 
 

115. Enteric bacteria are those bacteria that live:

 
 
 
 

116. The nucleus of bacteria is:

 
 
 
 

117. Which organisms are the oldest life forms?

 
 
 
 

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

 
 
 
 

119. Which of the following statement is correct?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

122. 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?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

125. Bacteria which are spherical are called:

 
 
 
 

126. Triple antigen injection or vaccine are for:

 
 
 
 

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

 
 
 
 

128. 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:

 
 
 
 

129. Some bacteria cannot be killed easily because of:

 
 
 
 

130. The DNA of E coli is:

 
 
 
 

131. Chemosynthetic bacteria are:

 
 
 
 

132. The antibiotic is obtained from:

 
 
 
 

133. Mycoplasma are:

 
 
 
 

134. Plasmids are:

 
 
 
 

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

 
 
 
 

136. In nitrification, Nitrosomonas bacteria converts:

 
 
 
 

137. Sometimes the bacterial cell is enclosed in:

 
 
 
 

138. Ethylene oxide is widely used to:

 
 
 
 

139. Pasteurized milk is:

 
 
 
 

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

 
 
 
 

141. Streptomycin is obtained from:

 
 
 
 

142. Chemoautotrophic nitrifying bacteria are:

 
 
 
 

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

 
 
 
 

144. Wine turns sour because of:

 
 
 
 

145. Little leaf disease of Brinjal is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

148. Bacteria were first discovered by:

 
 
 
 

149. Which bacteria convert NO_ to elemental nitrogen?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

152. Bacteria are considered to be plants because they:

 
 
 
 

153. Which is not true for Escherichia coli?

 
 
 
 

154. Which of the following are absent in Mycoplasma?

 
 
 
 

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

 
 
 
 

156. Gram stain is used to: