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: Microbiology
[{'content': 'Sterols are found in ? \nSelect and explain. \nA. Cell wall of Ricketssia, B. Cell membrane of Ricketssia, C. Cell wall of Mycoplasma, D. Cell membrane of Mycoplasma', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Cell membrane of Mycoplasma Mycoplasma lack cell wall. They are bounded by triple layered unit membrane that contains sterol. o Thus they require cholesterole and related sterols.", 'role': 'assistant'}]