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': 'Maximum protein to lipid ratio is seen in ? \nSelect and explain. \nA. Inner mitochondrial membrane, B. Outer mitochondrial membrane, C. Sarcoplasmic reticulum, D. Myelin sheath membrane', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Inner mitochondrial membrane Mitochondrial inner membrane has maximum protein contents with highest protein to lipid ratio and cell membrane in myelin has lowest protein to lipid ratio.Protein to lipid ratio in decreasing order of frequency is as follows:Inner mitochondrial membrane (3.2) : Maximum > Sacroplasmic reticulum (2.0) > outer mitochondrial membrane (1.1) = Human erythrocyte cell membrane (1.1) > Myelin sheath cell (plasma) membrane (0.23) : Minimum.In all the membranes, proteins content is higher than lipid, with only one major exception of myelin which has higher lipid content that protein to provide good insulation.", 'role': 'assistant'}]