Draw a well-labelled diagram of an antibody molecule.

Explanation

### Step-by-Step Solution to Draw a Well-Labelled Diagram of an Antibody Molecule

1. **Understand the Structure of Antibodies**:
- Antibodies, also known as immunoglobulins, have a Y-shaped structure.
- They consist of two types of polypeptide chains: two light chains and two heavy chains.

2. **Draw the Y-Shaped Structure**:
- Begin by sketching a large "Y" shape. This will represent the overall structure of the antibody.
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