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

Options

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

Answer

To determine which of the given amino acids is a basic essential amino acid, we need to follow these steps:

### Step 1: Understand Essential Amino Acids
Essential amino acids are those that cannot be synthesized by the body and must be obtained through diet. There are 10 essential amino acids that humans need.

### Step 2: Identify Basic Amino Acids
Basic amino acids are characterized by having a side chain that contains a basic (positively charged) functional group at physiological pH. The basic amino acids include:
- Arginine
- Lysine
- Histidine

### Step 3: List the Essential Amino Acids
The 10 essential amino acids are:
1. Arginine
2. Histidine
3. Leucine
4. Isoleucine
5. Lysine
6. Methionine
7. Phenylalanine
8. Threonine
9. Tryptophan
10. Valine

### Step 4: Identify Basic Essential Amino Acids
From the list of essential amino acids, the basic ones are:
- Arginine
- Lysine
- Histidine

### Step 5: Conclusion
Among the given amino acids, the basic essential amino acids are Arginine and Lysine. If the question specifically asks for one, then either of these would be correct, but typically, Lysine is often highlighted as a key basic essential amino acid.

### Final Answer
The basic essential amino acid among the given options is **Lysine**.

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