This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Enzymes, Subject name: Biochemistry
[{'content': 'Hexokinase is \nSelect and explain. \nA. Ligase, B. Transferase, C. Oxidoreductase, D. Reductase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A hexokinase is an enzyme that phosphorylates hexoses (six-carbon sugars), forming hexose phosphate. In most organisms, glucose is the most impoant substrate of hexokinases, and glucose-6-phosphate is the most impoant product. Hexokinase can transfer an inorganic phosphate group from ATP to a substrate.', 'role': 'assistant'}]