182k views
2 votes
Type of eukaryotic post-transcriptional modification that enhances stability and translational efficiency.

A) 5'-Capping
B) Polyadenylation
C) Splicing
D) Methylation

User Sherwin Yu
by
7.9k points

1 Answer

5 votes

Final answer:

The eukaryotic post-transcriptional modification that enhances mRNA stability and translational efficiency is 5'-capping, where a 7-methylguanosine cap is added to the pre-mRNA.

Step-by-step explanation:

The type of eukaryotic post-transcriptional modification that enhances both stability and translational efficiency is A) 5'-Capping. This process involves the enzymatic addition of a 7-methylguanosine cap to the 5' end of the nascent pre-messenger RNA (pre-mRNA) as it is being synthesized. This cap protects the mRNA from degradation and is recognized by factors involved in protein synthesis, aiding in the initiation of translation by ribosomes. Another important post-transcriptional modification is B) Polyadenylation, which adds a poly-A tail to the pre-mRNA's 3' end, further protecting it from degradation and signaling for export to the cytoplasm.

User Michael Cottier
by
7.6k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.