Which of the following amino acid is basic in nature ?

Options

A. Glutamic acid
B. Lysine
C. Valine
D. Tyrosine

Answer

To determine which of the following amino acids is basic in nature, we will analyze the provided options: glutamic acid, lysine, valine, and tyrosine.

### Step-by-step Solution:

1. **Understand the Classification of Amino Acids**:
Amino acids can be classified into three categories based on their side chains:
- Acidic amino acids
- Basic amino acids
- Neutral amino acids

2. **Identify Acidic Amino Acids**:
- The acidic amino acids include glutamic acid and aspartic acid.
- Glutamic acid is one of the options provided.

3. **Identify Basic Amino Acids**:
- The basic amino acids include lysine, arginine, and histidine.
- Lysine is one of the options provided.

4. **Identify Neutral Amino Acids**:
- Valine and tyrosine are classified as neutral amino acids.

5. **Evaluate Each Option**:
- **Glutamic Acid**: This is an acidic amino acid, so it is not the correct answer.
- **Lysine**: This is a basic amino acid, making it a potential correct answer.
- **Valine**: This is a neutral amino acid, so it is not the correct answer.
- **Tyrosine**: This is also a neutral amino acid, so it is not the correct answer.

6. **Conclusion**:
- The only amino acid from the options that is classified as basic is **lysine**.

### Final Answer:
**Lysine** is the basic amino acid among the options provided.

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