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Biotechnology Objective Questions { Transgenic Plant }

43. Expression of antisense RNA in transgenic plants is a general method used to
A.activate the expression of all genes in a biochemical pathway
B.eliminate the expression of all genes in a biochemical pathway
C.block the expression of virus coat protein genes
D.reduce or eliminate the expression of individual genes
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44. Tomatoes exhibiting delayed ripening express antisense RNA against
A.glycerol 1 phosphate acyl transferase
C.ACC deaminase
D.sucrose phosphate synthase gene
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45. Given the DNA sequence ATTAAGGC, which sequence would be used by researchers as an antisense molecule?
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46. Which of the following gene detoxify herbicide bronoxynil?
B.Glutathione S-transferase (GST)
C.Phosphinothricin acetyl transferase
D.All of these
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47. 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
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48. Which of the following is not a characteristic of a transgenic crop?
A.herbicide resistance
B.Bt insect resistance toxin
C.increased methionine content
D.none of these
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49. Phosphinothricin acetyl transferase is encoded by
A.gene bxn in Klebsiella pneumoniae
B.bar gene in Streptomyces spp
C.both (a) and (b)
D.none of these
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