During photorespiration glycolic acid is oxidised to glyoxylic acid inside

Options

A. chloroplast
B. peroxysome
C. motochondria
D. lysosome

Answer

**Step-by-Step Solution:**

1. **Understanding Photorespiration**: Photorespiration is a process that occurs in C3 plants when there is a low concentration of carbon dioxide and a high concentration of oxygen. Under these conditions, the plant shifts from photosynthesis to photorespiration.

2. **Identifying the Organelles Involved**: The three main organelles involved in photorespiration are chloroplasts, peroxisomes, and mitochondria. Each plays a specific role in the conversion of compounds during this process.

3. **Formation of Phosphoglycolate**: In photorespiration, the enzyme ribulose bisphosphate carboxylase/oxygenase (RuBisCO) accepts oxygen instead of carbon dioxide, leading to the formation of phosphoglycolate.

4. **Conversion of Phosphoglycolate**: The phosphoglycolate then moves into the peroxisome, where it is converted into glycolate.

5. **Oxidation of Glycolic Acid**: The glycolate is further oxidized to glyoxylic acid inside the peroxisome. This step is crucial as it indicates the specific location of the oxidation process.

6. **Further Metabolism**: After the formation of glyoxylic acid, it is converted into glycine, which then moves to the mitochondria where it is transformed into serine. The serine can then return to the Calvin cycle.

7. **Conclusion**: The oxidation of glycolic acid to glyoxylic acid occurs specifically in the peroxisomes.

**Final Answer**: The oxidation of glycolic acid to glyoxylic acid occurs inside the **peroxisomes**.

---