When a cut piece of DNA linked with plasmid and transfers the linked DNA then in this condition plasmid act as ________.

Answer

To solve the question, we need to understand the role of plasmids in biotechnology, particularly in the context of gene cloning. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding the Components**:
- We have a cut piece of DNA, which is typically a fragment that contains a gene of interest from a foreign organism.
- This DNA needs to be transferred into a host organism for the purpose of cloning or expressing a desired trait.

2. **Role of Plasmids**:
- Plasmids are small, circular DNA molecules that are separate from chromosomal DNA and can replicate independently.
- They are commonly used as vectors in genetic engineering to transfer foreign DNA into host cells.

3. **Linking DNA with Plasmid**:
- The cut piece of DNA is linked to the plasmid using enzymes like ligases. This process creates a recombinant DNA molecule.
- The plasmid now carries the foreign DNA along with its own sequences.

4. **Transfer of Linked DNA**:
- Once the plasmid is formed with the linked DNA, it can be introduced into a competent host cell (a cell that can take up foreign DNA).
- This process is often facilitated by methods such as transformation, electroporation, or microinjection.

5. **Function of the Plasmid**:
- In this context, the plasmid acts as a vehicle to carry the foreign DNA into the host cell.
- Since it is specifically used to clone the foreign DNA, it is referred to as a **cloning vector**.

6. **Conclusion**:
- Therefore, when a cut piece of DNA is linked with a plasmid and transfers the linked DNA, the plasmid acts as a **cloning vector**.

### Final Answer:
The plasmid acts as a **cloning vector**.

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