Question
Which of the following amino acids is categorized as a nonessential amino acid?
| A. |
Leucine |
| B. |
Threonine |
| C. |
Tryptophan |
| D. |
Proline |
Show Answer
|
Correct Answer � D Explanation |
 |
Classification of Amino Acids:
-
- Essential amino acids cannot be synthesized by the body and must be obtained from the diet (e.g., leucine, threonine, tryptophan).
- Nonessential amino acids can be synthesized by the body and do not need to be obtained from the diet (e.g., proline, alanine).
Reasoning for Each Option:
-
- (A) Leucine: An essential amino acid.
- (B) Threonine: An essential amino acid.
- (C) Tryptophan: An essential amino acid.
- (D) Proline: A nonessential amino acid, synthesized from glutamate.