In electrophoresis which compound is use to stain DNA fragments

Answer

**Step-by-Step Solution:**

1. **Understanding Electrophoresis**: Electrophoresis is a laboratory technique used to separate macromolecules such as DNA, RNA, and proteins based on their size and charge.

2. **Purpose of Staining**: In electrophoresis, staining is necessary to visualize the separated DNA fragments after they have been subjected to the electric field. Stains help in identifying the presence and size of the DNA fragments.

3. **Identifying the Staining Compound**: The commonly used compound for staining DNA fragments during electrophoresis is **ethidium bromide** (often abbreviated as ETBR).

4. **Properties of Ethidium Bromide**: Ethidium bromide is favored because it intercalates between the bases of DNA and fluoresces under UV light, allowing for the visualization of DNA bands.

5. **Conclusion**: Therefore, the compound used to stain DNA fragments in electrophoresis is ethidium bromide.

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