Final answer:
The activity not associated with post-translational processing is polyadenylation, which is the addition of a poly-A tail to mRNA for stabilization and not a protein modification process. the correct option is E) polyadenylation .
Step-by-step explanation:
Post-Translational Processing and Polyadenylation:
The activity not associated with post-translational processing is E) polyadenylation. During post-translational processing, a number of changes can occur to a polypeptide chain, which include:
- Glycosylation - the addition of sugar molecules to proteins.
- Specific cleavage of polypeptides - cutting the polypeptide chain to activate or mature the protein.
- Chaperonin activity - assisting in the correct folding of proteins.
- Addition of lipid groups - to anchor proteins to membranes or for signaling purposes.
Polyadenylation, on the other hand, is the addition of a poly-A tail to RNA during RNA processing, not post-translational processing of proteins. It is involved in the stabilization of mRNA molecules and preparation for translation, not in the modification of proteins after they are synthesized. Thus, the correct answer is E) polyadenylation.