Vector which can be used for both prokaryotes as well as eukaryotes is known as:

Options

A. Shuttle vector
B. Cosmid vector
C. Plasmid
D. Eco IM

Answer

To answer the question "Vector which can be used for both prokaryotes as well as eukaryotes is known as:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Prokaryotes**: These are organisms that lack a membrane-bound nucleus and organelles. Examples include bacteria.
- **Eukaryotes**: These organisms have a well-defined nucleus and membrane-bound organelles. Examples include plants, animals, and fungi.

2. **Identify the Types of Vectors**:
- **Shuttle Vector**: A vector that can replicate in two different host organisms, which can be either prokaryotic or eukaryotic.
- **Cosmid Vector**: A hybrid vector that can carry larger fragments of DNA but is primarily used in prokaryotes.
- **Plasmid**: A small circular DNA molecule used mainly in prokaryotes, specifically bacteria.
- **EcoRI**: This is not a vector but an enzyme used in molecular cloning.

3. **Evaluate the Options**:
- **Shuttle Vector**: This is designed specifically to function in both prokaryotic and eukaryotic cells, making it the most suitable choice.
- **Cosmid Vector**: While it can carry large DNA fragments, it is primarily used in prokaryotes.
- **Plasmid**: Typically used in prokaryotic systems and not suitable for eukaryotic cells.
- **EcoRI**: This is an enzyme, not a vector.

4. **Conclusion**:
- The vector that can be used for both prokaryotes and eukaryotes is the **Shuttle Vector**.

### Final Answer:
The vector which can be used for both prokaryotes as well as eukaryotes is known as a **Shuttle Vector**.

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