In photorespiration , release of `CO2` occurs in

Options

A. Mitochondria
B. Chloroplast
C. Peroxisomes
D. Glycoxisome

Answer

**Step-by-Step Solution:**

1. **Understanding Photorespiration:**
- Photorespiration is a process that occurs in plants, particularly in C3 plants, where oxygen is taken up and carbon dioxide is released in the presence of light.
- It is also referred to as oxidative photosynthesis or C2 photosynthesis.

2. **Role of Rubisco:**
- The enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) plays a crucial role in the process of photorespiration.
- Rubisco fixes carbon dioxide, but at low concentrations of carbon dioxide, it can also fix oxygen.

3. **Location of Processes:**
- The initial fixation of carbon occurs in the chloroplasts.
- The process then involves peroxisomes, where further reactions take place.

4. **Release of Carbon Dioxide:**
- The final step of photorespiration, where carbon dioxide is released, occurs in the mitochondria.
- Therefore, while the process starts in the chloroplasts and is facilitated by peroxisomes, the release of CO2 happens in the mitochondria.

5. **Conclusion:**
- The correct answer to the question "In photorespiration, the release of CO2 occurs in" is **mitochondria**.

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