<prompt> Which of the following is not an oxidoreductase -CatalaseGlucokinaseAlcohol dehydrogenasePeroxidase  <response>: Ans. is b i.e., Glucokinase Oxidoreductases are oxidases, dehydrogenases, hydroperoxidases Catalase, peroxidase, oxygenases.Glucokinase is a transferase. 