The cells of cyanobactoria and bacteria exhibit similarity in having

Options

A. Plastids
B. Nuclei
C. Centrosome
D. Naked DNA.

Answer

**Step-by-Step Solution:**

1. **Identify the Organisms**: Understand that cyanobacteria (often referred to as blue-green algae) and bacteria are both classified as prokaryotes. This means they lack a true nucleus and other membrane-bound organelles.

2. **Examine the Options**: The options provided are:
- Plastids
- Nuclei
- Zytosoman
- Naked DNA

3. **Analyze Each Option**:
- **Plastids**: These are organelles found in plant cells and are not present in cyanobacteria or bacteria.
- **Nuclei**: Prokaryotic cells, including cyanobacteria and bacteria, do not have true nuclei; instead, they have a nucleoid region where their genetic material is located.
- **Zytosoman**: This term is not commonly used in biological contexts and does not apply to either group.
- **Naked DNA**: Both cyanobacteria and bacteria contain their genetic material (DNA) in a nucleoid region without a surrounding nuclear membrane, which is referred to as naked DNA.

4. **Conclusion**: Based on the analysis, the similarity between cyanobacteria and bacteria is that they both have naked DNA.

5. **Final Answer**: The cells of cyanobacteria and bacteria exhibit similarity in having **naked DNA**.

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