Suggest a technique to a researcher who needs to separate fragments of DNA.

Explanation

**Step-by-Step Solution:**

1. **Isolate DNA:** The first step in the process is to isolate the DNA from the cells or tissues of interest. This can be done using various methods such as chemical lysis or mechanical disruption.

2. **Prepare Gel:** Once the DNA is isolated, prepare an agarose gel. Agarose is a polysaccharide that forms a gel matrix when dissolved in buffer and cooled. The concentration of agarose can be adjusted based on the size of the DNA fragments to be separated.

3. **Load DNA Samples:** After the gel has solidified, wells are created in the gel where the DNA samples can be loaded. The DNA samples, mixed with a loading dye, are carefully pipetted into these wells.

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