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': 'This is an example of: \nSelect and explain. \nA. Competitive inhibition, B. Non-competitive inhibition, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Competitive Inhibitors:\xa0\n\nIn competitive inhibition, the inhibitor (I) binds to the substrate-binding portion of the active site thereby blocking access by the substrate.\xa0\nThe structures of most classic competitive inhibitors, therefore, tend to resemble the\xa0structure of a substrate, and thus are termed substrate analogs.\xa0\nInhibition of the enzyme succinate dehydrogenase by malonate illustrates competitive inhibition by a substrate analog.\n\nKey Concept:\nCompetitive inhibition occurs when the inhibitor binds reversibly to the same site that the substrate would normally occupy and, therefore, competes with the substrate for that site.\nRef: Lippincott’s illustrated reviews for biochemistry, 7th edition.', 'role': 'assistant'}]