<prompt> Lactate dehydrogenase is:IsoenzymeCoenzymeAntienzymeZymogen  <response>: Ans. A. IsoenzymeIsoenzymes catalyse the same reaction but differ in physical and structural properties. Lactate dehydrogenase, creatine phosphokinase, alkaline phosphatase and alcohol dehydrogenase are examples of isoenzymes. 