Which of the following must occur to insure that mRNA is functional?
A) Nothing, the newly synthesized mRNA is always already functional.
B) The mRNA must be processed at the 3' end.
C) The mRNA must be processed on the 5' end.
D) The mRNA must be processed at both ends.

Question

Quizplus · Accepted Answer

Both ends of the mRNA molecule must be processed to form a functional mRNA. The 5' end is modified by the addition of a cap structure, while the 3' end is modified with a poly-A tail. These modifications protect the mRNA from degradation, assist in its export from the nucleus, and are important for translation by ribosomes. Without these modifications, the mRNA would not be functional.

Which of the Following Must Occur to Insure That MRNA