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MCQs

Total Questions : 137 | Page 10 of 14 pages
Question 91. A dead cell does not contribute to turbidity in the culture medium.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 92. Which of the following method is used for enumeration of bacteria in vaccines and cultures?
  1.    Microscopic Count
  2.    Membrane filter
  3.    Plate count
  4.    Dry weight determination
 Discuss Question
Answer: Option A. -> Microscopic Count
Answer: (a).Microscopic Count
Question 93. Which of the following is incorrect?
  1.    Mammalian cells are larger and more complex than microorganisms
  2.    Their growth rate is very fast compared to microorganisms
  3.    Mammalian cells are fragile
  4.    Most animal cells only grow when attached to surface
 Discuss Question
Answer: Option B. -> Their growth rate is very fast compared to microorganisms
Answer: (b).Their growth rate is very fast compared to microorganisms
Question 94. The size of a single plant cell is usually within the range of
  1.    10-20μm in diameter and 25-100μm long
  2.    20-40μm in diameter and 100-200μm long
  3.    40-60μm in diameter and 200-300μm long
  4.    60-80μm in diameter and 300-400μm long
 Discuss Question
Answer: Option B. -> 20-40μm in diameter and 100-200μm long
Answer: (b).20-40μm in diameter and 100-200μm long
Question 95. The archaebacterium Halobacterium, an extreme halophile, and Sulfolobus, a thermoacidophile, can be cultured in the presence of antibiotics such as streptomycin and chloramphenicol because
  1.    they contain ether-linked isoprenoids in their plasma membrane
  2.    they lack murein in their cell wall
  3.    they contain 80S, as opposed to 70S, ribosomes
  4.    all of the above
 Discuss Question
Answer: Option B. -> they lack murein in their cell wall
Answer: (b).they lack murein in their cell wall
Question 96. Anchorage -dependent cells require
  1.    wettable surface for growth
  2.    dry surface for growth
  3.    either (a) or (b)
  4.    nothing to do with the surface
 Discuss Question
Answer: Option A. -> wettable surface for growth
Answer: (a).wettable surface for growth
Question 97. The isolation of the gonorrhoea - causing organisms, Neisseria gonorrhoeae,from a clinical specimen is facilitated by the use of media containing
  1.    cellulose
  2.    certain antibiotics
  3.    succinate
  4.    none of these
 Discuss Question
Answer: Option B. -> certain antibiotics
Answer: (b).certain antibiotics
Question 98. Which of the following bacteria can grow in acidic pH?
  1.    Vibrio cholerae
  2.    Lactobacilli
  3.    Shigella
  4.    Salmonella
 Discuss Question
Answer: Option B. -> Lactobacilli
Answer: (b).Lactobacilli
Question 99. In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at
  1.    -60 to -78°C
  2.    -20 to -30°C
  3.    -30 to -48°C
  4.    -48 to -58°C
 Discuss Question
Answer: Option A. -> -60 to -78°C
Answer: (a).-60 to -78°C
Question 100. The solidifying agent commonly used in preparation of media is/are
  1.    agar
  2.    silica gel
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)

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