This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of carbohydrate, Subject name: Biochemistry
[{'content': 'One of the following is considered to be the key regulatory enzyme of glycolysis \nSelect and explain. \nA. Hexokinase, B. Phosphofructokinase, C. Phosphoglycerate kinase, D. Pyruvate kinase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Phosphofructokinase is both inducible and subject to allosteric regulation and has a major role in regulating the rate of glycolysis.These reactions, catalyzed by hexokinase (and glucokinase), phosphofructokinase, and pyruvate kinase, are the major sites of regulation of glycolysis.Phosphofructokinase is considered key regulator.Harper 30th edition pg: 172', 'role': 'assistant'}]