Which of the following metabolic reactions is not catalysed by microsomal enzymes?: (A) Glucuronidation, (B) Acetylation, (C) Oxidation, (D) Reduction
Answer is B. PHASE 1 * Oxidation * Reduction All are catalysed by microsomal enzymes PHASE 2 * Glucuronidation * Acetylation * Methylation All are catalyzed by non microsomal enzymes except glucuronidation which is catalysed by microsomal enzymes.