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': "Which of the following doesn't occur during the processing of RNA? \nSelect and explain. \nA. Terminal addition, B. Nucleoside modification, C. Nucleoside cleavage, D. Chemical hydrolysis", 'role': 'user'}, {'content': "Answer: D \nExplanation: Precursor tRNA is processed to form mature tRNA. Alterations during processing are of three types: nucloelytic reactions, nucleoside modifications, terminal additions of nucleotides. Chemical hydrolysis is not a pa of RNA processing. Poly A tailing and 5'capping occurs in the processing of RNA. Methylation and deamination are known to occur. Introns will be removed after cleavage in the process.", 'role': 'assistant'}]