Collagen is rich in_____________?
Correct answer: D. Proline and glycine
- A. Glutamate and glycine
- B. Alanine and glycine
- C. Glutamate and proline
- D. Proline and glycine
Explanation
Collagen has a characteristic repeating sequence rich in glycine and proline, including hydroxyproline. These residues support its tightly packed triple-helix structure.
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