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
Transcription refers to 
Select and explain. 
A. 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.
B: the process where a DNA sequence is copied into RNA for the purpose of gene expression.
Answer: B: the process where a DNA sequence is copied into RNA for the purpose of gene expression. 
Explanation: None