Question

Which part of mitochondria has almost 70-75% protein content?

(a) Outer membrane

(b) Inner membrane

(c) Both outer and inner membrane

(d) Intermembrane space

Answer 1

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.