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': 'Fluoride which is used in the collection of blood samples for glucose estimation inhibits whch of the following enzyme? \nSelect and explain. \nA. Glucokinase, B. Hexokinase, C. Enolase, D. Glucose-6-phosphatase', 'role': 'user'}, {'content': "Answer: C \nExplanation: For blood glucose estimation in the laboratory, fluoride is added to the blood to prevent glycolysis by cells by inhibiting enzyme enolase so that blood glucose is correctly estimated. Ref: Harper's Principles of Internal Medicine, 26th Edition, Page 137; Textbook of Biochemistry By Vasudevan, 5th Edition, Pages 58, 87", 'role': 'assistant'}]