All are aromatic amino acids except: (A) Lysine, (B) Phenylalanine, (C) Tyrosine, (D) Tryptophan
Answer is A. Aromatic amino acids are Phenylalanine and Tyrosine.Lysine is a Dibasic monocarboxylic amino acid.Ref: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 24