Which of the following statements about eukaryotic mrna processing is not correct?
a. the mrna transcipt must be exported from the nuleus
b. a 5' cap and a 3' poly(a) tail must be added
c. the introns are removed
d. a 3' cap and a 5' poly(a) tail must be added
e. exons are spliced together to form the mrna transcript

The correct answer is d. a 3' cap and a 5' poly(A) tail must be added.

Explanation:

This answer is incorrect because when the mRNA is going outside the nucleus a poly-A tail is added to the 3' end and the guanine cap is added to the 5' end. Therefore, the statement is inverted and wrong. These features are attached to the ends in order for the RNAm to get to the ribosomes without being scrapped out of the cell.

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