Which one does not contain DNA ?

Options

A. Peroxisome
B. Nucleus
C. Chloroplast
D. Mitochondria

Answer

To determine which option does not contain DNA, we will analyze each of the given options: Peroxisome, Nucleus, Chloroplast, and Mitochondria.

### Step-by-Step Solution:

1. **Understanding the Options**:
- **Peroxisome**: A small organelle involved in metabolic processes, particularly the breakdown of fatty acids and detoxification of hydrogen peroxide.
- **Nucleus**: The control center of the cell that contains the cell's genetic material (DNA).
- **Chloroplast**: An organelle found in plant cells that conducts photosynthesis and contains its own DNA.
- **Mitochondria**: The powerhouse of the cell that generates energy and also contains its own DNA.

2. **Analyzing Each Option for DNA Content**:
- **Peroxisome**: Does not contain DNA or RNA. It is surrounded by a single membrane and relies on proteins imported from the cytosol.
- **Nucleus**: Contains DNA, which is organized into chromosomes.
- **Chloroplast**: Contains its own DNA, which is separate from the nuclear DNA.
- **Mitochondria**: Contains its own DNA, which is distinct from the nuclear DNA.

3. **Conclusion**:
- Among the options provided, the **Peroxisome** is the only organelle that does not contain DNA. Therefore, the correct answer is **Peroxisome**.

### Final Answer:
**Peroxisome** does not contain DNA.