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': 'In cytochrome P450, P stands for \nSelect and explain. \nA. Structural proteins, B. Substrate protein, C. Pigment, D. Polymer', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Molecular oxygen is incorporated into a variety of substrates by enzymes designated as oxygenases; many drugs, pollutants, and chemical carcinogens (xenobiotics) are metabolized by enzymes of this class, known as the cytochrome P450 systemCytochromes P450 Are Monooxygenases Impoant in Steroid Metabolism & for the Detoxification of Many DrugsReaction and also works together with cytochromes P450 in drug detoxificationRef: Harper&;s biochemistry text, 30th edition, biological oxidation', 'role': 'assistant'}]