This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Biochemistry
Western blot is done for: 
Select and explain. 
A. DNA, B. RNA, C. Lipid, D. Protein
D: Protein
Answer: D: Protein 
Explanation: Western Blotting detects Protein. Nohern Blotting detects RNA. Southern Blotting detects DNA. South-Western Blotting detects protein-DNA interactions. Technique Sample Analyzed Probe Southern Blot / DNA - DNA Hybridization DNA DNA Nohern Blot / RNA - DNA Hybridization RNA DNA Western Blot / Immuno Blot Protein Antibody South Western Blot Protein - DNA DNA Microarray mRNA or cDNA DNA ELISA Protein or Antibody Fig.: Basic Principle of Blotting