The extraction of DNA fragment from agarose gel is called_______ .

Answer

To solve the question, "The extraction of DNA fragment from agarose gel is called_______", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Agarose Gel Electrophoresis**:
- Agarose gel electrophoresis is a technique used to separate DNA fragments based on their size. DNA samples are loaded into wells in the gel and an electric current is applied, causing the DNA to migrate through the gel.

2. **Movement of DNA Fragments**:
- Smaller DNA fragments move faster and travel further towards the positive electrode compared to larger fragments. This separation allows us to visualize the DNA fragments.

3. **Staining the Gel**:
- After electrophoresis, the gel is often stained with a dye such as ethidium bromide, which binds to the DNA. When exposed to UV light, the DNA appears as bright orange bands.

4. **Extraction of DNA Fragments**:
- To utilize the separated DNA fragments, they need to be extracted from the gel. This is done by cutting out the specific band of interest along with a portion of the gel.

5. **Defining the Process**:
- The process of extracting the DNA fragment from the agarose gel is specifically referred to as "elution". This involves dissolving the gel piece containing the DNA fragment to retrieve the DNA for further use.

### Final Answer:
The extraction of DNA fragment from agarose gel is called **elution**.

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