Question

Which of the following statements regarding the permeability of the mitochondrial membrane is incorrect?

• A. The outer membrane is permeable to all kinds of molecules
• B. The enzymes of the electron transfer chain are embedded in the outer membrane
• C. The inner membrane is highly convoluted forming a series of infoldings
• D. The outer membrane resembles a sieve

Answer 1

The correct option is B The enzymes of the electron transfer chain are embedded in the outer membrane

The enzymes of electron transport system are present in the inner mitochondrial membrane and not the outer mitochondrial membrane.
The outer membrane is permeable and hence resembles a sieve.
The inner membrane forms a number of infoldings called as cristae, on which the electron transport chain is present.