Plant Biotechnology MCQ Questions & Answers

21

Determine the correctness or otherwise of the following Assertion [A] and the Reason [R].
Assertion [A]: A zygote and its immediate descendant cells are unspecialized and are called totipotent.
Reason [R]: Totipotent cells retain the capacity to differentiate into only a few cell types.

A) Both [A] and [R] are false B) Both [A] and [R] are true but [R] is not the correct reason for [A] C) Both [A] and [R] are true and [R] is the correct reason for [A] D) [A] is true but [R] is false

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Answer & Solution

Answer: Option D

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22

Plant secondary metabolites

A) Help to increase the growth rate of plant B) Help in plant reproduction processes C) Provide defense mechanisms against microbial attack D) Make the plant susceptible to unfavorable conditions

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Answer & Solution

Answer: Option C

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23

Determine the correctness or otherwise of the following Assertion (A) and Reason (R).
Assertion: The production of secondary metabolites in plant cell cultures is enhanced by the addition of elicitors.
Reason: Elicitors induce the expression of enzymes responsible for the biosynthesis of secondary metabolites.

A) Both (A) and (R) are true but (R) is not the correct reason for (A) B) Both (A) and (R) are true and (R) is the correct reason for (A) C) (A) is true but (R) is false D) (A) is false but (R) is true

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Answer & Solution

Answer: Option B

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24

When present in tissue culture medium, gibberellin

A) Helps to break dormancy of buds and bulbs B) Promotes dormancy development in buds and bulbs C) Is regarded as plant growth inhibitor D) Prevents normal recognition of auxin molecule

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Answer & Solution

Answer: Option A

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25

Callus formation from mature tissue explant occurs through

A) Dedifferentiation B) Redifferentiation C) Both A and B of the above D) Neither A nor B

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Answer & Solution

Answer: Option C

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26

Identify the natural plant growth regulators from the following list.
P. Zeatin
Q. Benzylaminopurine (BAP)
R. Indole-3-acetic acid (IAA)
S. 2, 4-Dichlorophenoxyacetic acid

A) P, Q B) Q, S C) P, R D) R, S

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Answer & Solution

Answer: Option C

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27

Which one of the following is the growth factor used for growth of tissues and organs in plant tissue culture?

A) Cysteine B) Cytokinin C) Cytidylate D) Cyclic AMP

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Answer & Solution

Answer: Option B

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28

Match the promoters Listed in Group I with the tissues listed in Group II

Group I	Group II
P. α-Amylase	1. Endosperm
Q. Glutenin	2. Tuber
R. Phaseollin	3. Aleurone
S. Patatin	4. Cotyledon

A) P-3, Q-1, R-4, S-2 B) P-3, Q-4, R-1, S-2 C) P-4, Q-2, R-1, S-3 D) P-1, Q-3, R-2, S-4

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Answer & Solution

Answer: Option A

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29

The transplastomic plants bear no risk for gene transfer through pollens as

A) The pollens degenerate before fertilization B) The transformed mitochondrial DNA is lost during pollen maturation C) The transformed chloroplast DNA is lost during pollen maturation D) The transformed genomic DNA are inherited maternally

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Answer & Solution

Answer: Option D

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30

Which of the following statements is most appropriate for recombinant antibody production in transgenic plants?

A) A very high level expression is always obtained B) Light promote more antibody production C) Such antibodies are free from other antigen of animal origin D) Functional antibody cannot be produced in plants

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Answer & Solution

Answer: Option C

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Plant Biotechnology MCQ Questions & Answers | Biotechnology