Identify the incorrect match.

Options

A. Regeneration of PEP- Mesophyll cells
B. RuBP oxygenase - Chloroplast
C. Photorespiration loss - cytoplasm of `CO_(2)`
D. Decarboxlation in - Bundle sheath cell `C_(4)` pathway

Answer

To identify the incorrect match from the given options regarding photosynthesis, we can analyze each option step by step.

### Step-by-Step Solution:

1. **First Option: Regeneration of PEP in Mesophyll Cells**
- The regeneration of phosphoenolpyruvate (PEP) occurs in the mesophyll cells during the Calvin cycle.
- This is a correct match as the Calvin cycle, which includes the regeneration of PEP, takes place in the mesophyll cells of leaves.

2. **Second Option: RUBP Oxygenase Present in Chloroplast**
- RUBP oxygenase, commonly known as Rubisco, is indeed located in the chloroplasts.
- Chloroplasts are the sites of photosynthesis and contain the necessary components for this process, making this a correct match.

3. **Third Option: Photorespiration Loss Linked to Cytoplasm and CO2**
- Photorespiration occurs when Rubisco acts on oxygen instead of carbon dioxide, particularly under conditions of low CO2 concentration.
- Therefore, linking photorespiration loss to CO2 is incorrect; it is actually linked to oxygen (O2). This makes this option the incorrect match.

4. **Fourth Option: Decarboxylation in C4 Plants**
- In C4 plants, decarboxylation occurs in the bundle sheath cells where Rubisco is located.
- This is true, as C4 plants have a specialized anatomy (Kranz anatomy) that allows for efficient CO2 utilization. Thus, this is also a correct match.

### Conclusion:
The only incorrect match is the third option: **Photorespiration loss linked to cytoplasm and CO2**.

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