During DNA replication in prokaryotes DNA is anchored

Options

A. Chromosome
B. Ribosome
C. Nucleolus
D. Mesosome.

Answer

**Step-by-Step Solution:**

1. **Understanding Prokaryotic DNA Replication**: In prokaryotes, DNA replication occurs in the cytoplasm since they lack a defined nucleus or membrane-bound organelles. This process involves the synthesis of new DNA strands from the existing parent strand.

2. **Nature of DNA Replication**: DNA replication in prokaryotes is semi-conservative and bi-directional. This means that each new DNA molecule consists of one original strand and one newly synthesized strand, and replication occurs in both directions from the origin of replication.

3. **Role of Mesosomes**: Mesosomes are extensions or invaginations of the plasma membrane in prokaryotes. They play a crucial role during DNA replication by anchoring the DNA at the midpoint, facilitating the separation of the two strands as replication proceeds.

4. **Evaluating the Options**:
- **Chromosomes**: Prokaryotes typically have a single circular chromosome, but DNA is not anchored to the chromosome itself during replication. Therefore, this option is incorrect.
- **Ribosomes**: These are involved in protein synthesis, not DNA replication, making this option incorrect as well.
- **Nucleolus**: This structure is involved in ribosome production and is absent in prokaryotes, so this option is also incorrect.
- **Mesosomes**: Since mesosomes assist in anchoring DNA during replication, this is the correct option.

5. **Conclusion**: The correct answer to the question is **mesosomes** (Option D), as they are the structures that anchor DNA during replication in prokaryotes.

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