Explain the basis on which the gel electrophoresis technique works. Write any two ways the products obtained through this technique can be utilized.

Explanation

### Step-by-Step Solution:

1. **Understanding Gel Electrophoresis**:
Gel electrophoresis is a laboratory technique used to separate DNA fragments based on their size. The process relies on the principle that DNA molecules are negatively charged due to their phosphate backbone.

2. **Preparation of Gel**:
A gel, typically made of agarose or polyacrylamide, is prepared and placed in an electrophoresis chamber. Wells are created in the gel to load the DNA samples.

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