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
Nohern blotting is used for analysis of 
Select and explain. 
A. DNA, B. RNA, C. Proteins, D. Polysaccharides
B: RNA
Answer: B: RNA 
Explanation: To demonstrate specific RNA The total RNA is isolated from the cell, electrophoresed and then blotted on membrane Probed with radioactive cDNA There will b RNA-DNA hybridization Used to detect the gene expression in a tissueRef: DM Vasudevan, 7th edition, page no: 634