With respect to DNA fragmentation
Statement A: Gel electrophoresis and elution are two important processes
Statement B : After staining with ethidium bromide, it has to be exposed to UV light

Options

A. Only A is correct and B is not correct
B. Only B is correct
C. Both A and B are correct statements
D. Only A is correct

Answer

### Step-by-Step Solution:

1. **Understanding Statement A**:
- Statement A claims that "Gel electrophoresis and elution are two important processes."
- **Explanation**: Gel electrophoresis is a technique used to separate DNA, RNA, or proteins based on their size. It is a crucial method in biotechnology, particularly in applications like DNA fingerprinting, where samples are separated according to their molecular size. Elution, on the other hand, refers to the process of extracting one material from another, typically by washing it with a solvent. This is important for isolating DNA samples for further analysis.

2. **Evaluating Statement B**:
- Statement B states that "After staining with ethidium bromide, it has to be exposed to UV light."
- **Explanation**: Ethidium bromide is a fluorescent dye that intercalates between the bases of DNA. When exposed to UV light, it fluoresces, allowing visualization of the DNA bands on the gel. This is a standard procedure in molecular biology to detect DNA after gel electrophoresis.

3. **Conclusion**:
- Both statements A and B are correct. Gel electrophoresis and elution are indeed important processes in DNA analysis, and the use of ethidium bromide followed by UV exposure is a standard method for visualizing DNA.

### Final Answer:
Both Statement A and Statement B are correct.

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