In photorespiration , glycolate and glycine synthesis occurs respecitvely in

Options

A. Chloroplast and mitochondria
B. peroxisome and chloroplast
C. chloroplast and peroxisome
D. peroxisome and mitochondria

Answer

To answer the question regarding where glycolate and glycine synthesis occurs during photorespiration, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Photorespiration**:
- Photorespiration is a process that occurs in C3 plants, where the enzyme Rubisco can utilize both oxygen and carbon dioxide. When oxygen levels are high and carbon dioxide levels are low, Rubisco reacts with oxygen instead of carbon dioxide.

2. **Formation of Phosphoglycolate**:
- When Rubisco uses oxygen, it combines it with ribulose bisphosphate (RuBP) to produce two molecules: phosphoglycerate and phosphoglycolate. This reaction occurs in the chloroplast.

3. **Conversion to Glycolate**:
- The phosphoglycolate produced in the chloroplast is then converted into glycolate. This conversion also takes place within the chloroplast.

4. **Migration to Peroxisome**:
- The glycolate then migrates from the chloroplast to the peroxisome, where it undergoes further transformation.

5. **Formation of Glycine**:
- Inside the peroxisome, glycolate is converted into glycine. This is a crucial step in the photorespiration pathway.

6. **Further Processing in Mitochondria**:
- The glycine produced in the peroxisome can then migrate to the mitochondria, where it can be converted into serine.

### Conclusion:
- Thus, glycolate synthesis occurs in the **chloroplast**, and glycine synthesis occurs in the **peroxisome**.

### Final Answer:
- Glycolate synthesis occurs in the chloroplast, and glycine synthesis occurs in the peroxisome. Therefore, the correct option is **chloroplast and peroxisome**.

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