Which type of DNA is found in bacteria ?

Options

A. Circular DNA
B. Membrane bound DNA
C. Straight DNA
D. Helical DNA

Answer

**Step-by-Step Solution:**

1. **Understanding DNA in Bacteria**:
- Bacteria are prokaryotic organisms, meaning they lack a nucleus and membrane-bound organelles. Their genetic material is not enclosed within a nuclear membrane.

2. **Identifying the Structure of Bacterial DNA**:
- The DNA in bacteria is typically found in a circular form. This circular DNA is not associated with histones (proteins that help in packaging DNA) as seen in eukaryotic cells.

3. **Nucleoid Region**:
- In bacteria, the circular DNA is located in a region called the nucleoid. This region is not membrane-bound, which is characteristic of prokaryotic cells.

4. **Eliminating Incorrect Options**:
- **Membrane-bound DNA**: This is incorrect as bacteria do not have a nuclear membrane.
- **Straight DNA**: This is also incorrect because bacterial DNA is not linear; it is circular.
- **Helical DNA**: While DNA can be helical in structure, this is not a specific characteristic of bacterial DNA.

5. **Conclusion**:
- Therefore, the type of DNA found in bacteria is **circular DNA**.

**Final Answer**: Circular DNA

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