Question

Messenger RNAs that contain no stop codons are eliminated by

A) nonstop decay.
B) directed RNase activity.
C) nonsense-mediated decay.
D) error-mediated repair.
E) none of these mechanisms.

Answer 1

Messenger RNAs that lack stop codons are eliminated by the nonstop decay mechanism, which is critical for maintaining the proper functioning of cellular processes.

Step-by-step explanation:

Messenger RNAs that contain no stop codons are eliminated by nonstop decay. This process ensures that defective mRNA sequences that lack stop codons do not accumulate in the cell, which could potentially lead to the production of aberrant and potentially harmful proteins.

This quality control mechanism targets and degrades these problematic mRNAs to maintain cellular health and homeostasis.