Plant Biotechnology MCQ Questions & Answers

51

Majority of the cereals are highly recalcitrant to Agrobacterium mediated transformation, and so direct transformation methods have been developed to transform such plants. Which of the following direct transformation methods is applicable to intact plant tissues?

A) Calcium chloride and PEG-mediated transformation B) Liposome-mediated transformation C) Electroporation D) Transformation using micro projectiles

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Answer & Solution

Answer: Option B

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52

Vincristine and vinblastine, two commercially important secondary metabolites from Catharanthus roseus, are examples of

A) Alkaloids B) Flavonoids C) Terpenoids D) Steroids

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Answer & Solution

Answer: Option A

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53

Agrobacterium based transformation of protoplasts obtained from dicots is based on the fact that

A) These exhibit strong chromosomal structures B) These have two cotyledons C) These exhibits strong wound response D) These have long tap root system

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Answer & Solution

Answer: Option C

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54

Match the secondary metabolites (Group I) with the corresponding plant species (Group II).

Group I	Group II
P. Morphine	1. Datura stramonium
Q. Pyrethrins	2. Catharanthus roseus
R. Scopolamine	3. Papaver somniferum
S. Vincristine	4. Tagetes erecta

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

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Answer & Solution

Answer: Option B

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55

Hydrated synthetic seeds which are produced by ion exchange reaction involve mixing the somatic embryos in a solution of

A) Sodium alginate and dropping it in a solution of calcium nitrate B) Calcium alginate and dropping it in a solution of sodium nitrate C) Calcium alginate and dropping it in a solution of ammonium nitrate D) Mannitol and dropping it in a solution of sodium nitrate

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Answer & Solution

Answer: Option A

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56

Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: Somatic embryogenesis in plants is a twostep process comprising of embryo initiation followed by embryo production.
Reason: Embryo initiation is independent of the presence of 2, 4-dichlorophenoxyacetic acid, whereas embryo production requires a high concentration of 2, 4-dichlorophenoxyacetic acid.

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

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57

Which of the following statements are true about glyphosate tolerant transgenic plants?
P. Transgenic plants detoxify glyphosate.
Q. Transgenic plants produce an altered enzyme that is not affected by glyphosate.
R. Transgenic plants sequester glyphosate in vacuoles.
S. Transgenic plants overcome the inhibition of aromatic amino acid biosynthesis.

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

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Answer & Solution

Answer: Option C

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Plant Biotechnology MCQ Questions & Answers | Biotechnology