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MCQs

Total Questions : 46 | Page 3 of 5 pages
Question 21.  Which is the most common carbon source used in the plant cell culture media?
  1.    Sucrose
  2.    Glucose
  3.    Fructose
  4.    Maltose
 Discuss Question
Answer: Option A. -> Sucrose
Question 22.  Which of the following is an ethylene biosynthesis inhibitor?
  1.    Citric acid
  2.    Succinic acid
  3.    Activated charcoal
  4.    Silver thiosulphate
 Discuss Question
Answer: Option D. -> Silver thiosulphate
Question 23.  Nitrogen in the plant cell culture media is provided by either ammonia or nitrate salt. In the media
  1.    utilization of ammonium cause culture pH to drop while utilization of nitrate cause culture pH to rise
  2.    utilization of nitrate cause culture pH to drop while utilization of ammonium cause culture pH to rise
  3.    utilization of both ammonium and nitrate result in rise in pH
  4.    utilization of both ammonium and nitrate result in drop in pH
 Discuss Question
Answer: Option A. -> utilization of ammonium cause culture pH to drop while utilization of nitrate cause culture pH to rise
Question 24.  Which of the following growth regulator promote cell division?
  1.    Auxins
  2.    Cytokinins
  3.    Gibberellins
  4.    Brassinosteroids
 Discuss Question
Answer: Option B. -> Cytokinins
Question 25.  Which of the following growth regulator is used to stimulate embryo or shoot development?
  1.    Auxins
  2.    Cytokinins
  3.    Gibberellins
  4.    Brassinosteroids
 Discuss Question
Answer: Option C. -> Gibberellins
Question 26.  Which of the following growth regulator cause plant cells to grow?
  1.    Auxins
  2.    Cytokinins
  3.    Gibberellins
  4.    Brassinosteroids
 Discuss Question
Answer: Option A. -> Auxins
Question 27.  Which of the following growth regulator is added for short initiation during plant regeneration from callus?
  1.    Auxins
  2.    Cytokinins
  3.    Gibberellins
  4.    Brassinosteroids
 Discuss Question
Answer: Option B. -> Cytokinins
Question 28. . Concentration of sucrose generally used in plant cell culture media is
  1.    10-15 g/l
  2.    20-30 g/l
  3.    40-50 g/l
  4.    60-70 g/l
 Discuss Question
Answer: Option B. -> 20-30 g/l
Question 29.  In plant cell culture media, auxins and cytokinins are used in the range of
  1.    l-50μM
  2.    50-100μM
  3.    100-125μM
  4.    more than 125μM
 Discuss Question
Answer: Option A. -> l-50μM
Question 30.  Silver thiosulphate is added to culture medium as it helps to
  1.    maintain the pH
  2.    remove toxic phenolics from plant cells
  3.    prevent the gaseous plant hormone, ethylene dioxide from accumulating to detrimental condition.
  4.    all of the above
 Discuss Question
Answer: Option C. -> prevent the gaseous plant hormone, ethylene dioxide from accumulating to detrimental condition.

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