Which one is useful in prokaryotic replication ?

Options

A. Mesosome
B. Plasmid
C. Ribosome
D. Mitochodria

Answer

To answer the question "Which one is useful in prokaryotic replication?", we can analyze the options provided: mesosomes, plasmids, ribosomes, and mitochondria.

### Step-by-Step Solution:

1. **Understanding Prokaryotic Replication**:
- Prokaryotic cells, such as bacteria, replicate their DNA in a process known as binary fission. This involves the duplication of their single circular DNA molecule.

2. **Evaluating the Options**:
- **Mesosomes**: These are invaginations of the cell membrane found in prokaryotes. They are believed to play a role in DNA replication and help in the distribution of duplicated chromosomes during cell division.
- **Plasmids**: These are small, circular DNA molecules that exist independently of the chromosomal DNA. They can replicate independently and often carry genes that confer advantageous traits, but they are not directly involved in the primary replication of chromosomal DNA.
- **Ribosomes**: These are the sites of protein synthesis in all cells, including prokaryotes. They do not play a direct role in DNA replication.
- **Mitochondria**: These are organelles found in eukaryotic cells and are not present in prokaryotes. They are involved in energy production and are not related to DNA replication in prokaryotes.

3. **Identifying the Correct Answer**:
- Among the options, **mesosomes** are specifically mentioned to assist in DNA replication and the distribution of chromosomes during cell division in prokaryotes. Therefore, they are the most relevant to prokaryotic replication.

4. **Conclusion**:
- The correct answer to the question is **mesosomes**.

### Final Answer:
**Mesosomes** are useful in prokaryotic replication.

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