MCAT Biology Question 131: Answer and Explanation
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Question: 131
11. Which of the following correctly pairs the molecule with its primary site of absorption?
- A. Chylomicrons—lacteals
- B. Amino acids—large intestine
- C. Vitamins A and E—stomach
- D. Cholesterol—ascending colon
Correct Answer: A
Explanation:
Chylomicrons contain triacylglycerols, cholesteryl esters, and fat-soluble vitamins and are secreted by intestinal cells into lacteals. Amino acids, fat-soluble vitamins (like vitamins A and E), and cholesterol are all absorbed in the small intestine.