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
In a mutation if valine is replaced by which of the following would not result in any change in the function of protein: 
Select and explain. 
A. Proline, B. Leucine, C. Glycine, D. Aspaic acid
D: Aspaic acid
Answer: D: Aspaic acid 
Explanation: D i.e. Aspaic acid