Which one consists of essential amino acids ?

Options

A. Trytophan and Glutamic acid
B. Lysine and Phenylalanine
C. Leucine and Glysine
D. Valine and Histidine.

Answer

To determine which option consists of essential amino acids, we can 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 from the diet. There are a total of 20 amino acids, out of which 9 are classified as essential.

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

### Step 3: Analyze the Options
- Now, let's look at the options provided:
1. Tryptophan and Glutamic Acid
2. Lysine and Phenylalanine
3. Leucine and Glycine
4. Valine and Histidine

### Step 4: Identify Essential Amino Acids in Each Option
- **Option 1:** Tryptophan (essential) and Glutamic Acid (non-essential)
- **Option 2:** Lysine (essential) and Phenylalanine (essential)
- **Option 3:** Leucine (essential) and Glycine (non-essential)
- **Option 4:** Valine (essential) and Histidine (essential)

### Step 5: Determine the Correct Answer
- From the analysis, we can see that:
- Option 1 has 1 essential amino acid.
- Option 2 has 2 essential amino acids.
- Option 3 has 1 essential amino acid.
- Option 4 has 2 essential amino acids.

### Conclusion
- The options that consist of essential amino acids are:
- **Option 2: Lysine and Phenylalanine**
- **Option 4: Valine and Histidine**

However, since the question asks for one option that consists of essential amino acids, the best answer is **Lysine and Phenylalanine**.

### Final Answer
- **Lysine and Phenylalanine** consist of essential amino acids.

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