Questions and answers for exam Preparation

MCQs

Total Questions : 159 | Page 7 of 16 pages

Question 61. What are the macronutrients used in plant cell culture medium?

N, P, K, S, Na
N, P, K, Ca, Cl
N, P, K, S, Ca
N, P, Ca, Na, Cl

Discuss Question

Answer: Option C. -> N, P, K, S, Ca
Answer: (c).N, P, K, S, Ca

Question 62. Neutralized activated charcoal is occasionally added to young regenerating cultures to

remove toxic phenolics produced by the stressed plant cell
help to remove plants growth regulators introduced at an earlier stage
both (a) and (b)
maintain the pH of the medium

Discuss Question

Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)

Question 63. Which of the following is an ethylene biosynthesis inhibitor?

Citric acid
Succinic acid
Activated charcoal
Silver thiosulphate

Discuss Question

Answer: Option D. -> Silver thiosulphate
Answer: (d).Silver thiosulphate

Question 64. Nitrogen in the plant cell culture media is provided by either ammonia or nitrate salt. In the media

utilization of ammonium cause culture pH to drop while utilization of nitrate cause culture pH to rise
utilization of nitrate cause culture pH to drop while utilization of ammonium cause culture pH to rise
utilization of both ammonium and nitrate result in rise in pH
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
Answer: (a).utilization of ammonium cause culture pH to drop while utilization of nitrate cause culture pH to rise

Question 65. Which of the following growth regulator is added for short initiation during plant regeneration from callus?

Auxins
Cytokinins
Gibberellins
Brassinosteroids

Discuss Question

Answer: Option B. -> Cytokinins
Answer: (b).Cytokinins

Question 66. Which of the following growth regulator promote cell division?

Auxins
Cytokinins
Gibberellins
Brassinosteroids

Discuss Question

Answer: Option B. -> Cytokinins
Answer: (b).Cytokinins

Question 67. Which of the following growth regulator is used to stimulate embryo or shoot development?

Auxins
Cytokinins
Gibberellins
Brassinosteroids

Discuss Question

Answer: Option C. -> Gibberellins
Answer: (c).Gibberellins

Question 68. Which of the following growth regulator cause plant cells to grow?

Auxins
Cytokinins
Gibberellins
Brassinosteroids

Discuss Question

Answer: Option A. -> Auxins
Answer: (a).Auxins

Question 69. The cellular organelle associated with secretion is the

golgi complex
mitochondrion
ribosome
lysosome

Discuss Question

Answer: Option A. -> golgi complex
Answer: (a).golgi complex

Question 70. Which of the following statements about mitochondrial proteins is true?

All mitochondrial proteins are coded for and synthesized in the mitochondria
Some mitochondrial proteins are coded for and synthesized in the mitochondria and others
All mitochondrial proteins are imported from the cytoplasm
Mitochondrial proteins arise from other mitochondrial proteins

Discuss Question

Answer: Option B. -> Some mitochondrial proteins are coded for and synthesized in the mitochondria and others
Answer: (b).Some mitochondrial proteins are coded for and synthesized in the mitochondria and others