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: Physiology
[{'content': 'Transcription refers to \nSelect and explain. \nA. the process where an mRNA is used as a template for protein production., B. the process where a DNA sequence is copied into RNA for the purpose of gene expression., C. the process where DNA wraps around histones to form a nucleosome., D. the process of replication of DNA prior to cell division.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]