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
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|
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.
