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MCQs

Total Questions : 46 | Page 2 of 5 pages
Question 11. Which of the following is not a cytokinin?
  1.    Kinetin
  2.    Zeatin
  3.    6 benzylaminopurine
  4.    2,4-dichlorophenoxyacetic acid
 Discuss Question
Answer: Option D. -> 2,4-dichlorophenoxyacetic acid
Question 12. Which of the following is not an auxin?
  1.    Indole butyric acid
  2.    Indole acetic acid (IAA)
  3.    zeatin
  4.    Naphthalenacetic acid (NAA)
 Discuss Question
Answer: Option C. -> zeatin
Question 13. Which is/are the disadvantage/(s) of using IAA in plant cell culture media?
  1.    It is unstable in solution
  2.    Conjugated to inactive form by plant cells
  3.    All of these
  4.    Gets easily oxidized
 Discuss Question
Answer: Option C. -> All of these
Question 14. To maintain the pH of the culture
  1.    synthetic buffers such as Tris, MES or HEPS are used
  2.    ammonium salts are used
  3.    organic acid such as citric, fumaric, malic and succinic acid is used
  4.    both (a) and (b)
 Discuss Question
Answer: Option D. -> both (a) and (b)
Question 15. Which is/are the naturally occurring plant auxins?
  1.    All of these
  2.    2,4-dichlorophenoxyacetic acid
  3.    Naphthalenacetic acid (NAA)
  4.    Indole acetic acid (IAA)
 Discuss Question
Answer: Option D. -> Indole acetic acid (IAA)
Question 16. Which of the following is not true about nurse or conditioned medium?
  1.    It contains uncharacterized growth factor released by growing cells
  2.    It is used in the culture of regenerating protoplast
  3.    it is removed aseptically from the culture and is autoclaved before use
  4.    It is liquid removed from the suspension of fast growing cells
 Discuss Question
Answer: Option C. -> it is removed aseptically from the culture and is autoclaved before use
Question 17. Very high sugar concentration (40-100 g/l) have been used
  1.    to adjust the osmotic potential of the media in short term treatment for regeneration
  2.    in specialized secondary metabolite production
  3.    none of these
  4.    Both (a) and (b)
 Discuss Question
Answer: Option D. -> Both (a) and (b)
Question 18. What is 'nurse' or conditioned medium?
  1.    Both (a) and (b)
  2.    It is the medium added to nurse the callus culture
  3.    It is the media full of growth factors used for the growth of cells
  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 19. What are the macronutrients used in plant cell culture medium?
  1.    N, P, K, Ca, Cl
  2.    N, P, K, S, Na
  3.    N, P, K, S, Ca
  4.    N, P, Ca, Na, Cl
 Discuss Question
Answer: Option C. -> N, P, K, S, Ca
Question 20. Neutralized activated charcoal is occasionally added to young regenerating cultures to
  1.    help to remove plants growth regulators introduced at an earlier stage
  2.    both (a) and (b)
  3.    remove toxic phenolics produced by the stressed plant cell
  4.    maintain the pH of the medium
 Discuss Question
Answer: Option B. -> both (a) and (b)

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