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 denaturation of proteins is all except: \nSelect and explain. \nA. Unfolding occurs, B. Disruption of secondary structure occurs, C. Sequence of amino acids remain the same, D. Biological activity is retained', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Biological activity is retained', 'role': 'assistant'}]