All of the following enzymes are involved in oxidation - reduction reactions, except: (A) Dehydrogenases, (B) Hydrolases, (C) Oxygenases, (D) Peroxidases
Answer is B. Oxidoreductases (enzymes involved in oxidation - reduction reactions) are : dehydrogenases, oxidases, hydroperoxidases (catalase, peroxidase), oxygenases, reductases and hydroxylases (not hydrolases).