This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Molecular Biology Techniques, Subject name: Biochemistry
[{'content': 'Southern blot is used to visualize - \nSelect and explain. \nA. RNA, B. DNA, C. Protein, D. Antibody', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., DNA o Visualization of a specific DNA or RNA fragment among the many thousand of contaminating molecules requires the convergence of number of techniques collectively termed the blot transfer.Southern blot-Detects DNANorthern blot-Detects RNAWestern blot-Detects proteins (proteins are separated by electrophoresis, renatured and analysed for an interaction by hybridization with a specific labelled DNA probe).", 'role': 'assistant'}]