Find the odd type of amino acid from the following

Options

A. Phenylalanine
B. Tyrosine
C. Tryptophan
D. Glycine

Answer

To find the odd type of amino acid from the given options: phenylalanine, tyrosine, tryptophan, and glycine, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Amino Acids**:
- Amino acids have a basic structure consisting of a carboxyl group (-COOH), an amino group (-NH2), a hydrogen atom, and a variable R group (side chain).

2. **Identify the R Groups of Each Amino Acid**:
- **Phenylalanine**: The R group is a benzene ring (aromatic).
- **Tyrosine**: The R group is also a benzene ring but with an -OH (hydroxyl) group attached (aromatic).
- **Tryptophan**: The R group contains a benzene ring along with a nitrogen atom in its structure (aromatic).
- **Glycine**: The R group is simply a hydrogen atom (non-aromatic).

3. **Classify the Amino Acids**:
- **Aromatic Amino Acids**: Phenylalanine, Tyrosine, and Tryptophan all contain benzene rings in their structure.
- **Aliphatic Amino Acid**: Glycine does not contain a benzene ring; its R group is just a hydrogen atom.

4. **Determine the Odd One Out**:
- Since phenylalanine, tyrosine, and tryptophan are all aromatic amino acids, and glycine is the only one that is aliphatic, glycine is the odd one out.

5. **Conclusion**:
- The odd type of amino acid among the given options is **glycine**.

### Final Answer:
**Glycine** is the odd type of amino acid from the list.

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