This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Enzymes, Subject name: Biochemistry
Lactate dehydrogenase is: 
Select and explain. 
A. Isoenzyme, B. Coenzyme, C. Antienzyme, D. Zymogen
A: Isoenzyme
Answer: A: Isoenzyme 
Explanation: 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.