First discovered amino acid is _________

Options

A. Asparagine
B. Aspartate
C. Glutamate
D. Glutamine

Answer

### Step-by-Step Solution:

1. **Understanding Amino Acids**:
- Amino acids are the building blocks of proteins. They are organic compounds that contain both an amino group (-NH2) and a carboxyl group (-COOH).

2. **Identifying the First Discovered Amino Acid**:
- The question asks for the first discovered amino acid. Historical records indicate that asparagine was the first amino acid to be identified.

3. **Source of Asparagine**:
- Asparagine was first isolated from the asparagus plant, which is where its name is derived from.

4. **Chemical Structure of Asparagine**:
- The structure of asparagine includes a carbon backbone, a carboxyl group, an amino group, and an additional side chain that characterizes it as an amino acid.

5. **Conclusion**:
- Therefore, the answer to the question "First discovered amino acid is _________" is **asparagine**.

### Final Answer:
The first discovered amino acid is **asparagine**.

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