51. The capsule of bacteria is chemically a:
Answer: B. polysaccharide (except in Anthrax bacillus)
Biology Class 11 Unit 6: Prokaryotes MCQs
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52. The capsule of Anthrax bacillus is made of:
Answer: B. polymerized D-glutamic acid
53. Gram-positive bacteria have a:
Answer: B. thicker peptidoglycan layer
54. Teichoic acid is found in:
Answer: B. Gram-positive bacteria
55. Lipopolysaccharide outer membrane is found in:
Answer: B. Gram-negative bacteria
56. The space between the outer membrane and the cytoplasmic membrane in Gram-negative bacteria is the:
Answer: B. periplasmic space
57. Beta-lactamases in the periplasmic space break down:
Answer: B. penicillin and other beta-lactam drugs
58. The three main shapes of bacteria are:
Answer: B. spherical, rod-shaped and spiral
59. A spherical bacterium is a:
Answer: B. coccus
60. Cocci occurring in pairs are called:
Answer: B. diplococci
61. Cocci in long chains are:
Answer: A. streptococci
62. Cocci in grape-like clusters are:
Answer: C. staphylococci
63. A packet of eight cocci is called:
Answer: C. sarcina (octad)
64. A packet of four cocci is a:
Answer: B. tetrad
65. Rod-shaped bacteria are called:
Answer: B. bacilli
66. Comma-shaped curved bacteria are called:
Answer: C. vibrio
67. Which is an example of a rod-shaped bacterium?
Answer: C. Escherichia coli
68. Thin-walled, flexible spiral bacteria are:
Answer: C. spirochetes
69. Treponema pallidum, causing syphilis, is a:
Answer: C. spirochete
70. The size range of bacteria in a single dimension is about:
Answer: B. 0.1 to 600 micrometres
71. Endospore formation is also called:
Answer: C. sporulation
72. Endospores are formed by bacteria like:
Answer: B. Clostridium and Bacillus
73. Endospore formation is not a means of reproduction because:
Answer: B. there is no increase in cell number
74. The endospore has a thick coat of a:
Answer: B. keratin-like material
75. The smaller cell formed by asymmetric division during sporulation is the:
Answer: B. forespore
76. Tetanus bacteria are resistant to conventional heat treatment because they:
Answer: C. form heat-resistant spores
77. Motile bacteria move by:
Answer: C. flagella, gliding, twitching motility or buoyancy changes
78. In twitching motility bacteria use their:
Answer: B. pili as grappling hooks
79. Bacteria with a single flagellum are:
Answer: C. monotrichous
80. Bacteria with a flagellum at each end are:
Answer: B. amphitrichous
81. Bacteria with clusters of flagella at the poles are:
Answer: C. lophotrichous
82. Bacteria with flagella all over the surface are:
Answer: D. peritrichous
83. The two modes of movement in E. coli are swimming and:
Answer: B. tumbling
84. Movement of bacteria in response to chemical stimulus is:
Answer: C. chemotaxis
85. Movement toward light is:
Answer: B. phototaxis
86. A bacterial flagellum is made of the protein:
Answer: B. flagellin
87. The three parts of a bacterial flagellum are:
Answer: B. basal body, hook and filament
88. The part that produces rotatory motion is the:
Answer: C. basal body
89. The hook of the flagellum connects the basal body to the:
Answer: B. filament
90. The diameter of a bacterial flagellum is about:
Answer: B. 20 nm
91. Bacterial flagella lack:
Answer: B. microtubules
92. The genetic material of E. coli is a:
Answer: B. single circular DNA of about 5 million base pairs
93. Spirochetes of the genus Borrelia contain:
Answer: C. a single linear chromosome
94. Accessory rings of DNA in bacteria are called:
Answer: B. plasmids
95. Autotrophic bacteria obtain carbon from:
Answer: B. carbon dioxide
96. The two major groups of autotrophic bacteria are:
Answer: B. photosynthetic and chemoautotrophic
97. Photosynthetic bacteria contain:
Answer: C. bacteriochlorophyll
98. Chemoautotrophic bacteria obtain energy by:
Answer: B. oxidation of inorganic substances
99. Which is a chemoautotrophic bacterium?
Answer: C. Nitrifying bacteria and sulphur bacteria
100. Heterotrophic bacteria obtain carbon from:
Answer: C. organic carbon compounds
About Biology Class 11 Unit 6 MCQs (Federal Board)
These 227 Biology MCQs cover Class 11 Unit 6: Prokaryotes of the Federal Board (FBISE) HSSC-I (1st Year / Class 11) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 5 pages of 50. Use the Print button to save this chapter as a PDF.