This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure & Function of Protein, Subject name: Biochemistry
Which among the following amino acids absorbs UV light? 
Select and explain. 
A. Leucine, B. Lysine, C. Tyrosine, D. Valine
C: Tyrosine
Answer: C: Tyrosine 
Explanation: Ans. C. TyrosineAmino acids which absorb 250-290 nm UV light are: phenylalanine, tyrosine, tryptophan (aromatic amino acids)Important biochemical & the wavelength of light which they absorb:a. Nucleotides - 260 nmb. Aromatic amino acids - 250-290 nmc. NADH - 340 nmd. Porphyrin -400 nm (Soret band)