Why are mRNAs capped at their 5\'-ends (5? m7G) and polyadenylated at the 3\' en

Question

Why are mRNAs capped at their 5'-ends (5? m7G) and polyadenylated at the 3' end (AAAn)? tagging the 5'- and 3'-end of a nascent mRNA molecule that undergoes extensive processing such as splicing, is a way to identify the true mRNA molecule from all the other RNA molecules that coexist in the nucleus a) b) capping and polyadenylating a mRNA molecule signals initiation of translation. tagging the 5'- and 3'-end of a nascent mRNA molecule that undergoes extensive processing such as splicing, is a way to label certain mRNA molecules destined to destruction. d) they are capped and polyadenylated to confer polarity to the mature mRNA.

Explanation / Answer

I bellieve the correct option to be A) tagging the 5 and 3 end of a nascent mRNA molecule that undergoes extensive processing such as splicing is a way to identify the true mRNA molecule fro all the other RNA molecules that coexist in the nucleus.

Only the Matured mRNA is transported out of the cell for translation.

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