Which enzyme is used to convert phenylalanine to tyrosine:: (A) Tyrosine synthase, (B) Tyrosine hydroxylase, (C) Phenylalanine hydroxylase, (D) Phenyl ethanolamine methyltransferase
Answer is C. Ans. (c) Phenylalanine hydroxylaseRef: Harpers Biochemistry, 30th ed. pg. 509-510* Phenylalanine hydroxylase: for conversion of Phenylalanine to tyrosine conversion* Tyrosine hydroxylase: for conversion of tyrosine to L-Dopa* Phenyl ethanolamine-N-methyltransferase: for conversion of norepinephrine to epinephrine