Serotonin is derived from: (A) Tyrosine, (B) Tryptophan, (C) Phenylalanine, (D) Methionine
Answer is B. Serotonin is a metabolite of tryptophan Tryptophan ------------------->5hydroxy tryptophan ------------------>5hyroxy tryptamine (serotonin )Ref: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 241