This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
[{'content': 'Nothern blot is used for the separation of \nSelect and explain. \nA. mRNA, B. DNA, C. Protein, D. Protein DNA interaction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Used to demonstrate specific RNA The total RNA is isolated from the cell, electrophoresed and then blotted on to a membrane This is. then probed with radioactive cDNAThere is RNA -DNA hybridization Used to detect gene expression in tissuesRef: DM Vasudevan, 7th edition, page no: 634', 'role': 'assistant'}]