Basic amino acids have an additional

Options

A. Carboxylic group
B. Amino group
C. Glutamate
D. Proline

Answer

**Step-by-Step Solution:**

1. **Understanding Amino Acids**: Amino acids are organic compounds that serve as the building blocks of proteins. Each amino acid has a central carbon atom bonded to four groups: a hydrogen atom, a carboxylic acid group (-COOH), an amino group (-NH2), and a variable side chain (R group).

2. **Identifying Basic Amino Acids**: Basic amino acids are characterized by the presence of additional amino groups. The common basic amino acids include lysine, arginine, and histidine. These amino acids have an extra amino group in their structure.

3. **Structure of Basic Amino Acids**: In basic amino acids, the structure includes:
- One carboxylic acid group (-COOH)
- Two amino groups (-NH2) or one amino group and a positively charged ammonium ion (-NH3+)
- A variable R group that can also influence the basicity.

4. **Conclusion**: Therefore, basic amino acids have an additional amino group compared to neutral amino acids. This additional amino group contributes to their basic properties.

5. **Final Answer**: The basic amino acids have an additional amino group.