Cyanobacteria resemble bacteria in having :-

Options

A. Ribosomes
B. Naked DNA
C. Peptidoglycan wall
D. All the above

Answer

To answer the question "Cyanobacteria resemble bacteria in having:", we will analyze the options provided and determine which features are common between cyanobacteria and bacteria.

### Step-by-Step Solution:

1. **Identify the Characteristics of Cyanobacteria**:
- Cyanobacteria are a group of photosynthetic bacteria. They are often referred to as blue-green algae, although they are prokaryotic and not true algae.

2. **Examine the Options**:
- **Option 1: Ribosomes**:
- Cyanobacteria, like all bacteria, have ribosomes. Ribosomes are essential for protein synthesis and are made of ribonucleic acid (RNA) and proteins. This option is correct.

- **Option 2: Naked DNA**:
- Cyanobacteria possess a single circular chromosome that is not enclosed within a nucleus, which is characteristic of prokaryotes. This is referred to as "naked DNA." This option is also correct.

- **Option 3: Peptidoglycan wall**:
- The cell wall of cyanobacteria is made of peptidoglycan, which is a polymer that provides structural support. This is a common feature of many bacteria. This option is correct as well.

- **Option 4: All of the above**:
- Since all the previous options (ribosomes, naked DNA, and peptidoglycan wall) are correct, this option is also correct.

3. **Conclusion**:
- The correct answer to the question is **Option 4: All of the above**, as cyanobacteria share all these characteristics with bacteria.

### Final Answer:
Cyanobacteria resemble bacteria in having: **All of the above** (ribosomes, naked DNA, and peptidoglycan wall).