All the following enzymes are involved in the metabolism of xenobiotics except: (A) Hydroxylase, (B) Cytochrome oxidase, (C) Cytochrome P450, (D) Methylase
Answer is B. Oxidation, reduction, and hydroxylation are phase 1 reactionsCyp. 450 is the most common enzyme involved in the metabolism of various drugs in phase 1 and phase 2.Methylase - phase 2 reactionRef: Goodman Gillman 11th ed, pg 71