The 3 ′ end of eukaryotic pre-mRNAs are changed by:
A) removing the last phosphate group.
B) adding a "cap."
C) copying the last few bases so that it can form a duplex structure.
D) adding 100 − 250 adenine nucleotides.
E) phosphorylation of the mRNA molecule.

Question

Quizplus · Accepted Answer

The 3' end of eukaryotic pre-mRNAs undergoes polyadenylation, where a poly(A) tail consisting of 100-250 adenine nucleotides is added. This modification is important for mRNA stability, nuclear export, and translation.

The 3 ′ End of Eukaryotic Pre-MRNAs Are Changed By