This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
RNA participates directly in all of the following except: 
Select and explain. 
A. Post translational modification, B. Post transcriptional modification, C. DNA replication, D. Splicing
A: Post translational modification
Answer: A: Post translational modification 
Explanation: POST TRANSLATIONAL MODIFICATIONS OF PROTEINS
The proteins synthesized in translation are, as such, not functional. Many changes take place in the polypeptides after the initiation of their synthesis or, most frequently, after  the protein synthesis is completed. These modifications include protein folding, trimming by proteolytic degradation, intein splicing and covalent changes which are collectively known as modifications.