Examples of aromatic amino acids are:

Options

A. Glycine and Alanine
B. Phenylalanine and tryptophan
C. Glycine and methionine
D. Glutamic acid and aspartic acid

Answer

To answer the question about examples of aromatic amino acids, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Aromatic Amino Acids**: Aromatic amino acids are those that contain an aromatic ring in their structure. An aromatic ring is a cyclic structure that follows Huckel's rule, typically consisting of alternating double bonds.

2. **Identify the Total Number of Amino Acids**: There are 20 standard amino acids, out of which only a few are classified as aromatic.

3. **List the Aromatic Amino Acids**: The three amino acids that are classified as aromatic are:
- **Phenylalanine**: Contains a benzyl side chain.
- **Tyrosine**: Contains a phenolic hydroxyl group in addition to the benzyl side chain.
- **Tryptophan**: Contains an indole side chain, which is a bicyclic structure with an aromatic ring.

4. **Evaluate the Options**: If provided with options, we need to evaluate which of them are aromatic:
- **Option A**: Glycine and Alanine - Neither are aromatic.
- **Option B**: Phenylalanine and Tryptophan - Both are aromatic.
- **Option C**: Glycine and Methionine - Neither are aromatic.
- **Option D**: Glutamic acid and Aspartic acid - Neither are aromatic.

5. **Select the Correct Answer**: Based on the evaluation, the correct answer is **Option B**: Phenylalanine and Tryptophan.

### Final Answer:
The examples of aromatic amino acids are **Phenylalanine and Tryptophan**.

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