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
Which of the following membrane has the highest protein content per gram tissue:- 
Select and explain. 
A. Inner mitochondrial membrane, B. Outer mitochondrial membrane, C. Plasma membrane, D. Myelin sheath
A: Inner mitochondrial membrane
Answer: A: Inner mitochondrial membrane 
Explanation: Ans. is 'a' is inner mitochondrial membrane .Ratio of protein to lipid in different membranes.Inner mitochondrial membrane -3.2 (Max.)Sarcoplasmic reticulum -2.0Outer mitochondrial membrane -1.1Myelin-0.23 In almost all the membranes of the body proteins are equal or exceed the quantity of lipid. The only exception is myelin (high lipid content provide good insulation).