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
Insulin acts on which enzyme in glycoysis- 
Select and explain. 
A. Glucokinase, B. Hexokinase, C. Glucose 6-Phosphatase, D. Adenylate kinase
A: Glucokinase
Answer: A: Glucokinase 
Explanation: A i.e. GlucokinaseIn glycolysis insulin acts on hexokinase IV (i.e. glucokinase) and hexokinase IIQ but not on other (I & III) hexokinase