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
Nothern blot is used for the separation of 
Select and explain. 
A. mRNA, B. DNA, C. Protein, D. Protein DNA interaction
A: mRNA
Answer: A: mRNA 
Explanation: 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