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
[{'content': 'In glycolysis, the first commited step is catalysed by : \nSelect and explain. \nA. 2 ,3 DPG, B. Glucokinase, C. Hexokinase, D. Phosphofructokinase.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Phosphofructokinase', 'role': 'assistant'}]