During photorespiration, the oxygen consuming reaction (s) occur in

Options

A. Peroxisomes
B. Mitochondria
C. Chloroplast
D. Chloroplast of bundle sheath cell

Answer

To solve the question regarding where the oxygen-consuming reactions occur during photorespiration, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Photorespiration**:
- Photorespiration is a process that occurs in plants where oxygen is consumed and carbon dioxide is released. It typically occurs when the enzyme Rubisco reacts with oxygen instead of carbon dioxide.

2. **Identifying the Organelles Involved**:
- The main organelles involved in photorespiration are chloroplasts, peroxisomes, and mitochondria. Each of these organelles plays a specific role in the process.

3. **Role of Chloroplasts**:
- In chloroplasts, the initial reaction occurs where Rubisco catalyzes the reaction between RuBP (ribulose bisphosphate) and oxygen, leading to the formation of 2-phosphoglycolate.

4. **Role of Peroxisomes**:
- The 2-phosphoglycolate is then converted to glycolate in the peroxisomes. This step does not consume oxygen but is part of the photorespiration pathway.

5. **Role of Mitochondria**:
- The glycolate is further processed in the mitochondria, where it is converted into glycine, and during this process, oxygen is consumed. Additionally, hydrogen peroxide (H2O2) is produced, which is then converted to water by the enzyme catalase.

6. **Conclusion**:
- Since the question specifically asks about the oxygen-consuming reactions during photorespiration, the correct answer is the mitochondria, where these reactions take place.

### Final Answer:
The oxygen-consuming reactions during photorespiration occur in **mitochondria** (Option B).