Question

Which of the following statements regarding mitochondrial membrane is not correct?

• 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 correct option is B:

Explanation of the correct option:

1. Electron transfer chain occurs in the inner mitochondrial membrane.
2. So, the enzymes are embedded in the inner membrane of mitochondria, not the outer membrane.
3. This is an incorrect fact about mitochondria.

Explanation of the incorrect option(s):

Option A:

1. The outer membrane of mitochondria is porous.
2. It allows molecules to pass through it.
3. This statement is true regarding mitochondria.

Option C:

1. The inner membrane is highly convoluted to increase the surface area for ATP production.
2. It has a series of infoldings called cristae.
3. This statement is also correct about mitochondria.

Option D:

1. Since the outer membrane allows all kinds of molecules to pass through them, it resembles a sieve.
2. This is also the right statement.

Final answer: "The enzymes of the electron transfer chain embedded in the outer membrane" statement regarding the mitochondrial membrane is not correct.