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MCQs

Total Questions : 46 | Page 4 of 5 pages
Question 31. . To maintain the pH of the culture
  1.    organic acid such as citric, fumaric, malic and succinic acid is used
  2.    synthetic buffers such as Tris, MES or HEPS are used
  3.    both (a) and (b)
  4.    ammonium salts are used
 Discuss Question
Answer: Option C. -> both (a) and (b)
Question 32. . Which of the following is not a cytokinin?
  1.    2,4-dichlorophenoxyacetic acid
  2.    6 benzylaminopurine
  3.    Zeatin
  4.    Kinetin
 Discuss Question
Answer: Option A. -> 2,4-dichlorophenoxyacetic acid
Question 33. . Which is/are the naturally occurring plant auxins?
  1.    Indole acetic acid (IAA)
  2.    Naphthalenacetic acid (NAA)
  3.    2,4-dichlorophenoxyacetic acid
  4.    All of the above
 Discuss Question
Answer: Option A. -> Indole acetic acid (IAA)
Question 34. .  Which is/are the disadvantage/(s) of using IAA in plant cell culture media?
  1.    It is unstable in solution
  2.    Gets easily oxidized
  3.    Conjugated to inactive form by plant cells
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 35. .  Which of the following is not an auxin?
  1.    Indole acetic acid (IAA)
  2.    Naphthalenacetic acid (NAA)
  3.    zeatin
  4.    Indole butyric acid
 Discuss Question
Answer: Option C. -> zeatin
Question 36. . Which of the following is not true about nurse or conditioned medium?
  1.    It is liquid removed from the suspension of fast growing cells
  2.    It contains uncharacterized growth factor released by growing cells
  3.    It is used in the culture of regenerating protoplast
  4.    it is removed aseptically from the culture and is autoclaved before use
 Discuss Question
Answer: Option D. -> it is removed aseptically from the culture and is autoclaved before use
Question 37. . What are the macronutrients used in plant cell culture medium?
  1.    N, P, K, S, Na
  2.    N, P, K, Ca, Cl
  3.    N, P, K, S, Ca
  4.    N, P, Ca, Na, Cl
 Discuss Question
Answer: Option C. -> N, P, K, S, Ca
Question 38. . What is 'nurse' or conditioned medium?
  1.    It is the media full of growth factors used for the growth of cells
  2.    It is the medium added to nurse the callus culture
  3.    Both (a) and (b)
  4.    It is the liquid medium removed from the suspension of fast growing cells
 Discuss Question
Answer: Option D. -> It is the liquid medium removed from the suspension of fast growing cells
Question 39. . Very high sugar concentration (40-100 g/l) have been used
  1.    in specialized secondary metabolite production
  2.    to adjust the osmotic potential of the media in short term treatment for regeneration
  3.    Both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option C. -> Both (a) and (b)
Question 40. . Neutralized activated charcoal is occasionally added to young regenerating cultures to
  1.    remove toxic phenolics produced by the stressed plant cell
  2.    help to remove plants growth regulators introduced at an earlier stage
  3.    both (a) and (b)
  4.    maintain the pH of the medium
 Discuss Question
Answer: Option C. -> both (a) and (b)

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