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
All are true about denatured proteins except: 
Select and explain. 
A. Amino acid sequence remains intact, B. The biological function remains intact, C. The isoelectric pH changes, D. Recovery after denaturation is not possible
B: The biological function remains intact
Answer: B: The biological function remains intact 
Explanation: B i.e. Biological function remains intact