Among the give amino acids, the basic essential amino acid is :

Options

A. Valine and Alanine
B. Lysine and Arginine
C. Alanine and Valine
D. Arginine and Alanine

Answer

To solve the question regarding which among the given amino acids is a basic essential amino acid, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Essential Amino Acids**:
- Essential amino acids (EAAs) are those that cannot be synthesized by the body and must be obtained through diet.

2. **Identify the Given Amino Acids**:
- The amino acids provided in the question are valine, lysine, alanine, and arginine.

3. **Classify the Amino Acids**:
- Amino acids can be classified as acidic, basic, or neutral based on their side chains (R groups).
- Basic amino acids typically contain additional amine groups (NH2) in their structure.

4. **List the Basic Amino Acids**:
- The common basic amino acids include:
- Arginine
- Lysine
- Histidine

5. **Determine Which of the Given Amino Acids are Basic**:
- From the list of provided amino acids:
- **Valine**: Neutral (no extra amine group)
- **Lysine**: Basic (contains an amine group in its side chain)
- **Alanine**: Neutral (no extra amine group)
- **Arginine**: Basic (contains multiple amine groups in its side chain)

6. **Conclusion**:
- Among the given amino acids, lysine and arginine are the basic essential amino acids.

### Final Answer:
The basic essential amino acids among the given options are **lysine and arginine**.

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