MCAT Biochemistry Question 160: Answer and Explanation
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Question: 160
10. Where does β-oxidation of fatty acids occur within the cell?
- A. Cytosol
- B. Mitochondria
- C. Smooth endoplasmic reticulum
- D. Plasma membrane
Correct Answer: B
Explanation:
β-Oxidation occurs within the mitochondria, along with the electron transport chain. In contrast, fatty acid synthesis occurs in the cytosol, choice (A). Fatty acyl carriers like the carnitine shuttle allow entry into the mitochondrion for breakdown.