Respiratory enzymes occurs in

Options

A. Chloroplasts
B. Mitochondria
C. Lysosome
D. Peroxisomes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where respiratory enzymes occur in the cell. To answer this, we need to identify which cell organelles are involved in respiration.

2. **Analyzing the Options**:
- **Chloroplasts**: These are found in plant cells and are primarily involved in photosynthesis, not respiration.
- **Mitochondria**: Known as the powerhouse of the cell, mitochondria are responsible for producing ATP through aerobic respiration and contain respiratory enzymes.
- **Lysosomes**: These organelles contain hydrolytic enzymes for digestion and are not involved in respiration.
- **Peroxisomes**: While they are involved in various metabolic processes, they do not primarily function in respiration.

3. **Identifying the Correct Answer**: Based on the analysis, the organelle that contains respiratory enzymes and is crucial for aerobic respiration is the mitochondria.

4. **Conclusion**: Therefore, the correct answer to the question "Respiratory enzymes occur in" is **mitochondria**.

---