This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
Hydrophobic amino acid is 
Select and explain. 
A. Alanine, B. Tyrosine, C. Glycine, D. Histidine
A: Alanine
Answer: A: Alanine 
Explanation: Amino acids having non-polar side chaindthese include Alanine,Valine,Leucine,Isoleucine,Methionine,Proline,Phenylalanine and Tryptophan.These groups are HYDROPHOBIC (waater repellant) and lipidophilic REFERENCE ; DM VASUDEVAN TEXTBOOK SEVENTH EDITION PAGE NO :26