From where the agarose extracted ?

Answer

### Step-by-Step Solution:

1. **Definition of Agarose**: Agarose is a polysaccharide that is commonly used in molecular biology for the separation of large molecules, especially DNA, through a process called electrophoresis.

2. **Types of Electrophoresis**: There are two main types of electrophoresis used in laboratories:
- **PAGE (Polyacrylamide Gel Electrophoresis)**: This method uses polyacrylamide gels for the separation of proteins and nucleic acids.
- **Agarose Gel Electrophoresis**: This method uses agarose gels, which are particularly effective for separating larger DNA fragments.

3. **Source of Agarose**: Agarose is derived from agar, which is a gelatinous substance.

4. **Extraction of Agar**: Agar is extracted from marine red algae. The specific types of red algae from which agar is commonly extracted include:
- **Gelidium**
- **Gracilaria**

5. **Conclusion**: Therefore, agarose is extracted from agar, which is obtained from marine red algae such as Gelidium and Gracilaria.