Autonomously replicating, circular, extra chromosomal DNA of prokaryotic cell is called

Options

A. Satellite DNA
B. Plasmid
C. Recombinant DNA
D. Nucleoid

Answer

To solve the question regarding the autonomously replicating, circular, extra chromosomal DNA of prokaryotic cells, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- The question refers to "autonomously replicating" which means that the DNA can replicate independently of chromosomal DNA.
- "Circular" indicates the shape of the DNA, which is not linear but rather looped.

2. **Identifying the Type of Cell**:
- The question specifies "prokaryotic cell." Prokaryotic cells are simpler cells without a nucleus, and they include bacteria.

3. **Recognizing Extra Chromosomal DNA**:
- In prokaryotic cells, there is DNA that exists outside of the main chromosomal DNA. This is referred to as extra chromosomal DNA.

4. **Identifying the Specific DNA**:
- The specific type of extra chromosomal DNA that is circular and can replicate independently in prokaryotic cells is known as a "plasmid."

5. **Conclusion**:
- Therefore, the answer to the question is that the autonomously replicating, circular, extra chromosomal DNA of prokaryotic cells is called a **plasmid**.

### Final Answer:
**Plasmid**