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
Replacing amino acid will not change its functions 
Select and explain. 
A. Glutamine to Asparagine, B. Aspaate and Glutamate, C. Alanine to tryptophan, D. None of these
A: Glutamine to Asparagine
Answer: A: Glutamine to Asparagine 
Explanation: Answer- A. Glutamine to Asparagine* Glutamine and Asparagine are Amide group containing amino acids.* These belongs to same category (hydrophilic /Homophilic) so no alteration in function