Which of the following does not contain DNA ?

Options

A. Mitochondrion
B. Chloroplast
C. Peroxysome
D. Nucleus

Answer

To determine which of the following options does not contain DNA, we will analyze each option provided:

1. **Mitochondrion**: Mitochondria are known as the powerhouse of the cell and they contain their own DNA, which is distinct from the nuclear DNA. Therefore, this option is incorrect.

2. **Chloroplast**: Chloroplasts are the organelles responsible for photosynthesis in plant cells and they also contain their own DNA. Thus, this option is also incorrect.

3. **Peroxisome**: Peroxisomes are involved in various metabolic processes, including the breakdown of fatty acids and the detoxification of hydrogen peroxide. Importantly, peroxisomes do not contain their own DNA. Therefore, this option is correct.

4. **Nucleus**: The nucleus is the control center of the cell and it contains the cell's genetic material in the form of DNA. Hence, this option is incorrect.

Based on the analysis above, the correct answer is **Peroxisome** as it does not contain DNA.

### Summary of Steps:
1. Analyze each organelle option provided.
2. Identify if each organelle contains DNA or not.
3. Conclude that Peroxisome is the only organelle listed that does not contain DNA.