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Which part of mitochondria has almost 70-75% protein content?(a) Outer membrane(b) Inner membrane(c) Both outer and inner membrane(d) Intermembrane spaceThis question was posed to me in an interview for job.Question is from Mitochondrial Structure and Function topic in division Mitochondrial Structure and Function of Cell Biology

Answer»

The correct choice is (b) Inner membrane

Easy explanation: The outer membrane of MITOCHONDRIA is composed of approximately 50% lipid by weight and CONTAINS a mixture of different enzymes. The inner membrane contains more than 100 different polypeptides and has a very HIGH protein to lipid ratio. The protein CONTENT EXCEEDS 70% by weight.



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