Biotechnology

Question: Low temperatures induce the expression of many cold-induced genes. Transgenic plants with improved cold tolerance have been produced by
[A].

expressing the protein that activates expression of these genes all the time in plants

[B].

cooling plants using the Peltier effect

[C].

expressing a gene for production of antifreeze (ethylene glycol) in plants

[D].

increasing evaporative cooling from leaf surfaces

Answer: Option A

Explanation:

No answer description available for this question.

Question: ACC demainase gene is responsible for
[A].

synthesis for ethylene

[B].

degradation of ACC an immediate precursor to ethylene

[C].

both (a) and (b)

[D].

synthesis of polygalactouranase

Answer: Option B

Explanation:

No answer description available for this question.

Question: Bruise resistant tomatoes have been developed by the expression of antisense RNA against
[A].

glycerol 1 phosphate acyl transferase

[B].

polygalactouranase

[C].

ACC deaminase

[D].

Sucrose phosphate synthase gene

Answer: Option B

Explanation:

No answer description available for this question.

Question: Cross protection against viruses in transgenic plants can be obtained by
[A].

inoculating the susceptible strain of a crop with a mild strain of a virus that helps in developing resistance against more virulent strain

[B].

inoculating the susceptible strain with the coat proteins of virulent strain

[C].

inoculating the susceptible strain with genes of nucleocapsid

[D].

any of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: Insect resistance in the transgenic plant has been achieved by
[A].

transferring genes for Bt toxins

[B].

transferring genes for protease inhibitors

[C].

transferring genes for other insecticidal secondary metabolities

[D].

all of the above

Answer: Option D

Explanation:

No answer description available for this question.

Question: Nitrilase is encoded by
[A].

gene bxn in Klebsiella pneumoniae

[B].

bar gene in Streptomyces spp

[C].

both (a) and (b)

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: For developing herbicide resistance in transgenic plants which of the following approach/(es) is/are used?
[A].

Target molecule is made insensitive to herbicide

[B].

Target protein is overproduced

[C].

A pathway should be introduced that detoxify the herbicide

[D].

All of the above

Answer: Option D

Explanation:

No answer description available for this question.