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

Options

A. grana of chloroplasts and peroxisomes
B. stroma of chloroplasts
C. stroma of chloroplasts and mitochondria
D. stroma of chloroplasts and peroxisomes

Answer

**Step-by-Step Solution:**

1. **Understanding Photorespiration**: Photorespiration is a process in plants where oxygen is consumed and carbon dioxide is released in the presence of light. It is important to note that this process does not produce ATP.

2. **Identifying the Organelles Involved**: During photorespiration, three main organelles are involved:
- **Chloroplast**: This is where the oxygen fixation occurs.
- **Peroxisome**: This organelle also consumes oxygen.
- **Mitochondria**: While this organelle is involved in the process, it primarily releases carbon dioxide.

3. **Analyzing the Options**: The question provides four options regarding where the oxygen-consuming reactions occur:
- Option 1: Grana of chloroplast and peroxisome
- Option 2: Stroma of chloroplast
- Option 3: Stroma of chloroplast and mitochondria
- Option 4: Stroma of chloroplast and peroxisome

4. **Correct Answer**: The correct answer is **Option 4: Stroma of chloroplast and peroxisome**. This is because both the stroma of the chloroplast and the peroxisome are involved in the oxygen-consuming reactions of photorespiration.

5. **Conclusion**: Therefore, during photorespiration, the oxygen-consuming reactions occur in the stroma of chloroplast and peroxisome.

---