In `C_(4)` pathway regeneration of PEP occurs in

Options

A. epidermal cells of laeves
B. cytosol of bundle sheath cells
C. chloroplast of mesophyll cells
D. chloroplast of bundle sheath cells

Answer

### Step-by-Step Solution

1. **Understanding C4 Pathway**: The C4 pathway is a photosynthetic process that occurs in certain plants, known as C4 plants, which are adapted to hot and dry environments.

2. **Location of Chloroplasts**: In C4 plants, chloroplasts are located in two types of cells: mesophyll cells and bundle sheath cells.

3. **Carbon Fixation**: Carbon fixation occurs in both mesophyll cells and bundle sheath cells. In mesophyll cells, the enzyme responsible for carbon fixation is PEP carboxylase.

4. **Role of PEP Carboxylase**: PEP carboxylase is crucial for the initial fixation of carbon dioxide, leading to the formation of a four-carbon compound called oxaloacetic acid.

5. **Regeneration of PEP**: The regeneration of phosphoenolpyruvate (PEP) occurs in the chloroplasts of mesophyll cells, where PEP carboxylase is active.

6. **Bundle Sheath Cells**: In bundle sheath cells, the enzyme Rubisco is present, which is involved in the Calvin cycle, but it does not play a role in the regeneration of PEP.

7. **Conclusion**: Therefore, the regeneration of PEP in the C4 pathway occurs specifically in the chloroplasts of mesophyll cells.

### Final Answer
The regeneration of PEP in the C4 pathway occurs in the **chloroplasts of mesophyll cells**.

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