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: Microbiology
[{'content': 'Nohern blotting is used for the separation of: \nSelect and explain. \nA. DNA, B. RNA, C. Proteins, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nohern blotting is used to separate RNA. Nohern blotting allows researchers to determine the level of production (and, therefore, control of expression) of a paicular mRNA by quantitative determination of the relative amount of that paicular mRNA relative to total mRNA. Southern blotting is used to identify and isolate a specific DNA sequence and can also quantitatively determine the number of times a specific sequence occurs in a paicular cell type. Western blotting is used to separate proteins. Ref: The Big Picture: Medical Biochemistry Lee W. Janson, Appendix II', 'role': 'assistant'}]