Quiz_Monera

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

 
 
 
 

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

 
 
 
 

3. Which statement is wrong in regard to bacteria?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

6. Acetobacter is useful in:

 
 
 
 

7. Which is the nuclear material in bacteria?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

11. Which is not true for Escherichia coli?

 
 
 
 

12. Pasteurized milk is:

 
 
 
 

13. Which is not found in bacteria?

 
 
 
 

14. Which of the following statement is correct?

 
 
 
 

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

 
 
 
 

16. 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:

 
 
 
 

17. Botulism is a:

 
 
 
 

18. Nitrifying bacteria play an important role by converting:

 
 
 
 

19. The largest known bacterium is:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

22. The DNA of E coli is:

 
 
 
 

23. Mycoplasmas are not viruses in nature because:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

28. Citrus canker is caused by:

 
 
 
 

29. 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:

 
 
 
 

30. Halophiles are the bacteria that require for growth:

 
 
 
 

31. Bacteriovirdin pigments are found in which bacteria:

 
 
 
 

32. Antibiotics cure the disease by:

 
 
 
 

33. Economic importance of bacteria lies in their being:

 
 
 
 

34. Some bacteria cannot be killed easily because of:

 
 
 
 

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

 
 
 
 

36. All archaebacteria lack:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

39. Plasmids are:

 
 
 
 

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

 
 
 
 

41. Bacteria growing on synthetic medium are called:

 
 
 
 

42. Clostridium can:

 
 
 
 

43. Chemosynthetic bacteria are:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

47. Sometimes the bacterial cell is enclosed in:

 
 
 
 

48. Pneumonia is caused by:

 
 
 
 

49. The antibiotic is obtained from:

 
 
 
 

50. Typhoid in man is caused by:

 
 
 
 

51. To which country Antony van Leeuwenhoek belong?

 
 
 
 

52. Leprosy is caused by:

 
 
 
 

53. 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?

 
 
 
 

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

 
 
 
 

55. Which bacteria convert NO_ to elemental nitrogen?

 
 
 
 

56. Most resistant spore in bacteria is:

 
 
 
 

57. In nitrification, Nitrosomonas bacteria converts:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

60. Select the wrong statement:

 
 
 
 

61. Cell walls of Gram-positive bacteria contain:

 
 
 
 

62. Usually, bacteria reproduce by:

 
 
 
 

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

 
 
 
 

64. Bacteria are placed under:

 
 
 
 

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

 
 
 
 

66. Azotobacter and Beijerinckia are the examples of:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

69. Germ theory of disease was proposed by:

 
 
 
 

70. Soil fertility is lost by the activities of:

 
 
 
 

71. Mycoplasma are:

 
 
 
 

72. Pasteur is famous for his:

 
 
 
 

73. Nitrogen-fixing bacteria may be located:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

78. The similarity between cyanobacteria and bacteria:

 
 
 
 

79. Cocci types of bacteria are:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

84. Mycoplasma contains:

 
 
 
 

85. Bacteria which are spherical are called:

 
 
 
 

86. 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?

 
 
 
 

87. Streptomycin is obtained from:

 
 
 
 

88. Water-borne bacterial diseases are:

 
 
 
 

89. Bacteria are considered to be plants because they:

 
 
 
 

90. 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:

 
 
 
 

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

 
 
 
 

92. 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:

 
 
 
 

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

 
 
 
 

94. Chemosynthetic bacteria are:

 
 
 
 

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

 
 
 
 

96. Which bacteria convert nitrate into nitrogen?

 
 
 
 

97. Commonest mode of asexual reproduction in bacteria is:

 
 
 
 

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

 
 
 
 

99. Streptomyces falls under:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

103. Photosynthetic bacteria have:

 
 
 
 

104. Bacteria are found everywhere, except:

 
 
 
 

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

 
 
 
 

106. Milk is converted to curd by:

 
 
 
 

107. What is the role of nitrifying bacteria?

 
 
 
 

108. Which of the following converts CO_ into carbohydrates?

 
 
 
 

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

 
 
 
 

110. Ethylene oxide is widely used to:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

113. Methanogens belong to:

 
 
 
 

114. Diphtheria is caused by:

 
 
 
 

115. Little leaf disease of Brinjal is caused by:

 
 
 
 

116. Chemoautotrophic nitrifying bacteria are:

 
 
 
 

117. What are plasmids?

 
 
 
 

118. 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?

 
 
 
 

119. Fertility of the soil is increased by:

 
 
 
 

120. The smallest bacterium is:

 
 
 
 

121. Which of the following are absent in Mycoplasma?

 
 
 
 

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

 
 
 
 

123. The nucleus of bacteria is:

 
 
 
 

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

 
 
 
 

125. Triple antigen injection or vaccine are for:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

128. Some diseases caused by bacteria are:

 
 
 
 

129. 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?

 
 
 
 

130. Mycoplasma is different from bacteria due to:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

135. Enteric bacteria are those bacteria that live:

 
 
 
 

136. An Hfr bacterium is one that contains:

 
 
 
 

137. Gram stain is used to:

 
 
 
 

138. Circular DNA is seen in:

 
 
 
 

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

 
 
 
 

140. Mycoplasma was discovered by:

 
 
 
 

141. E coli is a:

 
 
 
 

142. Broad spectrum antibiotic is, which:

 
 
 
 

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

 
 
 
 

144. Photoautotrophic bacteria have:

 
 
 
 

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

 
 
 
 

146. Which organisms are the oldest life forms?

 
 
 
 

147. Bacteria were first discovered by:

 
 
 
 

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

 
 
 
 

149. Mycoplasma are sensitive to:

 
 
 
 

150. Wine turns sour because of:

 
 
 
 

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

 
 
 
 

152. The mode of nutrition of bacteria is usually:

 
 
 
 

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

 
 
 
 

154. The root nodules of leguminous plants contain:

 
 
 
 

155. Botulinum toxin effects:

 
 
 
 

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