One of the following is not an amino acid______________?
Correct answer: C. Choline
- A. Glycine
- B. Hydroxy proline
- C. Choline
- D. Glutamic acid
Explanation
Choline is a quaternary ammonium compound and a component of phospholipids, not an amino acid. Glycine, glutamic acid, and hydroxyproline are amino acids or amino-acid derivatives found in proteins.
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