MCAT Biochemistry Question 117: Answer and Explanation
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Question: 117
12. How does the inner mitochondrial membrane differ from the outer mitochondrial membrane?
- A. The inner mitochondrial membrane is more permeable and lacks cholesterol.
- B. The inner mitochondrial membrane is less permeable and lacks cholesterol.
- C. The inner mitochondrial membrane is more permeable and has cholesterol.
- D. The inner mitochondrial membrane is less permeable and has cholesterol.
Correct Answer: B
Explanation:
The outer mitochondrial membrane is very permeable while the inner membrane is highly impermeable. The inner mitochondrial membrane is unique within the cell because it lacks cholesterol.