A key modification in the 3' end of eukaryotic mRNA is the addition of 50 to 250 adenine nucleotides, forming a poly(A) tail. Which of the following is NOT a function of the poly(A) tail?
A) The stability of mRNA transcripts in the cytoplasm is affected by the poly(A) tail.
B) The poly(A) tail facilitates the attachment of the ribosome to the mRNA.
C) The poly(A) tail is important for proper nuclear export of the mRNA.
D) The poly(A) tail at the 3' end translates to a long stretch of repeated amino acids.
E) Multiple proteins will recognize and bind to the poly(A) tail in the cytoplasm.

Question

Quizplus · Accepted Answer

The poly(A) tail does not translate into amino acids; it is a non-coding sequence that aids in mRNA stability, nuclear export, and translation initiation.

A Key Modification in the 3' End of Eukaryotic MRNA