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MCQs

Total Questions : 41 | Page 2 of 5 pages
Question 11. The protoplast can be used to
  1.    modify genetic information
  2.    all of these
  3.    study plant viral infections
  4.    create plant hybrid
 Discuss Question
Answer: Option B. -> all of these
Question 12. Anchorage -dependent cells require
  1.    wettable surface for growth
  2.    nothing to do with the surface
  3.    either (a) or (b)
  4.    dry surface for growth
 Discuss Question
Answer: Option A. -> wettable surface for growth
Question 13. The isolation of the gonorrhoea - causing organisms, Neisseria gonorrhoeae,from a clinical specimen is facilitated by the use of media containing
  1.    certain antibiotics
  2.    cellulose
  3.    none of these
  4.    succinate
 Discuss Question
Answer: Option A. -> certain antibiotics
Question 14. 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 contain 80S, as opposed to 70S, ribosomes
  3.    All of these
  4.    they lack murein in their cell wall
 Discuss Question
Answer: Option D. -> they lack murein in their cell wall
Question 15. The size of a single plant cell is usually within the range of
  1.    40-60μm in diameter and 200-300μm long
  2.    10-20μm in diameter and 25-100μm long
  3.    60-80μm in diameter and 300-400μm long
  4.    20-40μm in diameter and 100-200μm long
 Discuss Question
Answer: Option D. -> 20-40μm in diameter and 100-200μm long
Question 16. Stringent anaerobes can be grown in a media by taking special measure as
  1.    boiling the media for several minutes
  2.    any of these
  3.    addition of cysteine
  4.    passing through oxygen-free nitrogen
 Discuss Question
Answer: Option B. -> any of these
Question 17. Radical shifts in pH can be prevented by incorporating
  1.    a buffer
  2.    a reducing agent
  3.    an oxidizing agent
  4.    any of these
 Discuss Question
Answer: Option A. -> a buffer
Question 18.  For most bacteria, the optimum pH for growth lies between
  1.    6.5-7.5
  2.    3.5-4.5
  3.    4.5-5.5
  4.    5.5-6.5
 Discuss Question
Answer: Option A. -> 6.5-7.5
Question 19.  Which of the following is the necessary step for cultivating the microorganisms?
  1.    Preparing a culture medium for the growth of microorganisms
  2.    Sterilizing in order to eliminate all living microorganisms in vessel
  3.    Inoculating the microorganisms in the prepared medium
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 20.  Suspension cultures consist of cells and cell aggregates, growing dispersed in
  1.    liquid medium
  2.    solid nutrient medium
  3.    solid or liquid medium
  4.    none of these
 Discuss Question
Answer: Option A. -> liquid medium

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