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
Substitution of which amino acid in the place of glycine would result in increase in UV absorption of a protein solution 
Select and explain. 
A. Lysine, B. Arginine, C. Tryptophan, D. Histidine
C: Tryptophan
Answer: C: Tryptophan 
Explanation: Aromatic amino acids (Phenylalanine, Tyrosine, Trytophan) absorb UV light.
Maximum absorption is by, tryptophan.