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
[{'content': 'RNA participates directly in all of the following except: \nSelect and explain. \nA. Post translational modification, B. Post transcriptional modification, C. DNA replication, D. Splicing', 'role': 'user'}, {'content': 'Answer: A \nExplanation: POST TRANSLATIONAL\xa0MODIFICATIONS\xa0OF\xa0PROTEINS\nThe proteins synthesized\xa0in translation are, as\xa0such, not functional. Many changes take place\xa0in\xa0the polypeptides after the\xa0initiation of\xa0their\xa0synthesis or,\xa0most frequently, after\xa0 the protein synthesis\xa0is\xa0completed.\xa0These\xa0modifications\xa0include\xa0protein\xa0folding,\xa0trimming\xa0by\xa0proteolytic degradation, intein\xa0splicing\xa0and\xa0covalent\xa0changes which\xa0are\xa0collectively\xa0known\xa0as modifications.', 'role': 'assistant'}]