Which of the following set consists only of essential amino acdis

Options

A. Alanine, tyrosine, cystine
B. Leucine, lysine, tryptophan
C. Alanine, glutamine, lysine
D. Leucine, proline, glycine

Explanation

To determine which set consists only of essential amino acids, we first need to understand what essential amino acids are. Essential amino acids are those that cannot be synthesized by the body and must be obtained through diet.

### Step-by-Step Solution:

1. **Define Essential Amino Acids**:
Essential amino acids are amino acids that the human body cannot produce on its own. Therefore, they must be ingested through food.

2. **List of Essential Amino Acids**:
The essential amino acids include:
- Histidine
- Isoleucine
- Leucine
- Lysine
- Methionine
- Phenylalanine
- Threonine
- Tryptophan
- Valine

3. **Identify the Given Sets**:
We need to look at the options provided in the question (not specified here) and identify which set contains only the amino acids from the list of essential amino acids.

4. **Evaluate Each Set**:
For each set of amino acids provided in the question, check if all the amino acids listed in that set are part of the essential amino acids list.

5. **Select the Correct Set**:
The set that includes only essential amino acids and does not contain any non-essential amino acids is the correct answer.

### Conclusion:
After evaluating the sets, the answer will be the one that contains only the essential amino acids listed above.

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