What is an amino acid ? What does it form on polymerization?

Explanation

### Step-by-Step Solution

**Step 1: Definition of Amino Acid**
An amino acid is an organic compound that contains both an amino group (-NH2) and a carboxylic acid group (-COOH), along with a distinctive side chain (R group) that varies among different amino acids. This structure is essential for the function of amino acids in biological systems.

**Step 2: Structure of Amino Acids**
The general structure of an amino acid can be represented as follows:
- A central carbon atom (C)
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