Question

Which of the following is not a function of the 5' cap and 3' poly-A tail of a mature eukaryotic mRNA molecule?

a. To facilitate splicing

b. To prevent mRNA degradation

c. To aid export of the mature transcript to the cytoplasm

d. To aid ribosome binding to the transcript

Answer 1

A

Step-by-step explanation:

The 5' cap and 3' poly-A tail of a mature eukaryotic mRNA molecule are essential for the proper translation of the mRNA into protein. The 5' cap protects the mRNA from degradation and helps ribosomes bind to the mRNA. The 3' poly-A tail also helps prevent degradation and aids in the export of the mRNA from the nucleus to the cytoplasm.

Splicing is the process by which introns are removed from mRNA transcripts. The 5' cap and 3' poly-A tail are not involved in this process.

Answer 2

A

Step-by-step explanation:

The 5' cap and 3' poly-A tail of a mature eukaryotic mRNA molecule do not directly facilitate splicing. Splicing is the process of removing introns and joining exons in pre-mRNA to generate the mature mRNA molecule. The presence of the 5' cap and 3' poly-A tail is not directly involved in this splicing process.