This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory chain, Subject name: Biochemistry
[{'content': 'Amobarbital inhibit electron transpo \nSelect and explain. \nA. Complex I, B. Complex II, C. Complex III, D. Complex IV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Barbiturates such as amobarbital inhibit electron transpo Complex I by blocking the transfer from Fe-S to Q. At sufficient dosage, they are fatal in vivo. Reference: Harper; 30th edition; Page no: 132', 'role': 'assistant'}]