Identify the incorrect match .

Options

A. Regeneration of PEP - Mesophyll cells
B. RuBP oxygenase activity - Chloroplast
C. Photorespiratory loss - Chytoplasm of `CO_2`
D. Decarboxylation in - Bundle sheath cell `C_4` pathway

Answer

To identify the incorrect match from the given options regarding photosynthesis in higher plants, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Option 1: Host is regeneration of PEP and the match is mesophyll cell.**
- In the process of photosynthesis, the regeneration of phosphoenolpyruvate (PEP) occurs during the Calvin cycle, which takes place in the mesophyll cells of the leaves.
- **Conclusion:** This is a correct match.

2. **Option 2: RUBP oxygenase activity in chloroplast.**
- The enzyme ribulose bisphosphate carboxylase/oxygenase (RuBisCO) is found in the chloroplasts and is responsible for the carboxylation and oxygenation of ribulose bisphosphate (RUBP).
- **Conclusion:** This is also a correct match.

3. **Option 3: Photorespiratory loss of CO2 in the cytoplasm.**
- Photorespiration occurs primarily in the chloroplasts, not in the cytoplasm. It is a process that happens when CO2 levels are low, and it leads to the production of CO2 rather than its fixation.
- **Conclusion:** This is an incorrect match.

4. **Option 4: Photo decarboxylation in the bundle sheath pathway.**
- The bundle sheath cells are involved in the C4 pathway of photosynthesis, where decarboxylation occurs. This process is correctly matched with the bundle sheath cells.
- **Conclusion:** This is a correct match.

### Final Answer:
The incorrect match is **Option 3: Photorespiratory loss of CO2 in the cytoplasm.**

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