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
In glycolysis, insulin affects all of the following enzymes except: 
Select and explain. 
A. Phosphofructokinase, B. Pyruvate kinase, C. Glucokinase, D. Hexokinase
D: Hexokinase
Answer: D: Hexokinase 
Explanation: The activation as well as the quantities of ceain key enzymes of glycolysis, namely glucokinase (NOT hexokinase), phosphofructokinase and pyruvate kinase are increased by insulin.