The tail added to pre-mRNA is
A) coded for by DNA.
B) composed of poly T.
C) important for mRNA stability.
D) attached to its 5´ end.
E) All of the above

Question

Quizplus · Accepted Answer

The tail added to pre-mRNA is composed of a string of adenosine nucleotides (poly A) and is important for mRNA stability. It is not coded for by DNA and is attached to the 3´ end of the mRNA, not the 5´ end. Therefore, only option C is correct.

The Tail Added to Pre-MRNA Is