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
The enzyme involved in the first committed step of glycolysis is: 
Select and explain. 
A. Phosphofructokinase, B. Glucose-6-phosphatase, C. Hexokinase, D. Enolase
A: Phosphofructokinase
Answer: A: Phosphofructokinase 
Explanation: None