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: Biochemistry
Western blot is used for ? 
Select and explain. 
A. DNA, B. RNA, C. Sugar, D. Protein
D: Protein
Answer: D: Protein 
Explanation: Ans. is 'd' i.e., ProteinVisualization 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.