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': 'True about tRNA ? \nSelect and explain. \nA. 80% of total RNA, B. Contains 50-60 nucleotides, C. CCA sequence is transcribed, D. Longest RNA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: "The CCA tail is a CCA sequence at 3\' end of the tRNA molecule. In prokaryotes, CCA sequence is transcribed. In eukaryotes, the CCA sequence is added during processing"."tRNA is the smallest of three major species of RNAs" -- Dinesh puri tRNA comprises 15% of total RNA in the cell. It contains 73-93 nucleotide residue.', 'role': 'assistant'}]