Why do DNA fragments move towards the anode during gel electrophoresis ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Gel Electrophoresis**: Gel electrophoresis is a laboratory technique used to separate DNA fragments based on their size. It involves placing DNA samples in a gel matrix and applying an electric current.

2. **Charge of DNA**: DNA molecules are negatively charged due to the phosphate groups in their backbone. This negative charge is crucial for their movement in an electric field.

3. **Application of Electric Field**: When an electric current is applied, it creates an electric field across the gel. The gel has two terminals: anode (positive) and cathode (negative).

...