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': 'All of the following take pa in oxidative phosphorylation except \nSelect and explain. \nA. NADH, B. FADH2, C. NADPH, D. ATP', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The NADPH system is responsible for generating free radicals in immune cellsNADPH is also used for anabolic pathways, such as lipid synthesis, cholesterol synthesis, and fatty acid chain elongation.Reference:', 'role': 'assistant'}]