This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Which of the following is not an oxidoreductase - 
Select and explain. 
A. Catalase, B. Glucokinase, C. Alcohol dehydrogenase, D. Peroxidase
B: Glucokinase
Answer: B: Glucokinase 
Explanation: Ans. is 'b' i.e., Glucokinase Oxidoreductases are oxidases, dehydrogenases, hydroperoxidases (Catalase, peroxidase), oxygenases.Glucokinase is a transferase.