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Which of the following prevents the digestion of mRNA by exonucleases?

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+1 vote
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in Cell Biology by (121k points)
Which of the following prevents the digestion of mRNA by exonucleases?

(a) methyl-guanosine cap

(b) methylene blue

(c) poly(A) tail

(d) bromophenol blue

I have been asked this question in semester exam.

My doubt stems from Gene Expression in portion Gene Expression of Cell Biology

1 Answer

+2 votes
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Best answer
Right choice is (a) methyl-guanosine cap

The best explanation: The methylguanosine cap at the 5’ end of the mRNA prevents its digestion by the exonucleases and also plays an important role in the initiation of translation.

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