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

Amethyl-guanosine cap

Bmethylene blue

Cpoly(A) tail

Dbromophenol blue

Answer:

A. methyl-guanosine cap

Read 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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