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
[{'content': 'True about Isopeptide bond: \nSelect and explain. \nA. It makes protein resistant, B. Bond is formed b/w carboxyl terminus of one protein and the amino group of a lysine residue on another, C. Involves in post-transcriptional modification of protein and Enzyme acts as catalyst for the bond formation both, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: All i.e. (It makes protein resistant, Bond is formed b/w carboxyl terminus of one protein and the amino group of a lysine residue on another, Involves in post-transcriptional modification of protein, Enzyme acts as catalyst for the bond formation)', 'role': 'assistant'}]