Enzyme catalase occurs in

Options

A. Lysosome
B. Sphaerosome
C. Peroxisome
D. Peroxisome and glyoxysome

Answer

**Step-by-Step Solution:**

1. **Understanding the Enzyme Catalase**:
- Catalase is an enzyme that catalyzes the decomposition of hydrogen peroxide (H₂O₂) into water (H₂O) and oxygen (O₂). It is crucial for protecting cells from oxidative damage.

2. **Occurrence of Catalase**:
- Catalase is found in all living organisms, including bacteria, plants, and animals. This widespread presence indicates its essential role in cellular metabolism.

3. **Identifying the Correct Organelles**:
- The question asks where catalase is found. The relevant organelles to consider are lysosomes, spirosomes, and peroxisomes.
- **Lysosomes**: These are membrane-bound vesicles that contain digestive enzymes but are not specifically known for catalase.
- **Spirosomes**: These are involved in lipid storage and synthesis, and do not contain catalase.
- **Peroxisomes**: These organelles are specifically known for containing catalase and are involved in the breakdown of hydrogen peroxide.

4. **Conclusion**:
- Based on the analysis, the correct answer is that catalase occurs in **peroxisomes**. Additionally, it can also be found in **glyoxysomes**, which are specialized peroxisomes found in plants.

**Final Answer**: Enzyme catalase occurs in peroxisomes and glyoxysomes.

---