The 3′ end of eukaryotic pre-mRNAs is 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, which involves the addition of 100−250 adenine nucleotides, forming a poly(A) tail. This modification is crucial for mRNA stability, nuclear export, and translation.

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