Amino acids have both an amino group and a carboxy group in their structure. Which amongst the following is an amino acid ?

Options

A. Formic acid
B. Glycerol
C. Glyolic acid
D. Glycine

Explanation

To determine which of the given options is an amino acid, we need to analyze the structure of each option based on the definition of amino acids. Amino acids are organic compounds that contain both an amino group (-NH2) and a carboxyl group (-COOH) in their structure.

### Step-by-Step Solution:

1. **Identify the Components of Amino Acids:**
- Amino acids must have two functional groups: an amino group (-NH2) and a carboxyl group (-COOH).

2. **Examine the Options:**
- **Formic Acid:** This is a carboxylic acid with the formula HCOOH. It does not contain an amino group, so it is not an amino acid.
- **Glycerol:** This is a simple polyol compound (sugar alcohol) with the formula C3H8O3. It does not contain either an amino group or a carboxyl group, so it is not an amino acid.
- **Glycolic Acid:** This is a carboxylic acid with the formula C2H4O3. It contains a carboxyl group but lacks an amino group, so it is not an amino acid.
- **Glycine:** This is the simplest amino acid with the formula C2H5NO2. It contains both an amino group (-NH2) and a carboxyl group (-COOH).

3. **Conclusion:**
- Among the options provided, glycine is the only compound that meets the criteria of having both an amino group and a carboxyl group. Therefore, the correct answer is **glycine**.

### Final Answer:
The amino acid among the options is **glycine**.