In the leaves of `C_(4)` plants, malic acid formation during `CO_(2)` fixation occurs in the cells of

Options

A. Phloem
B. Epidermis
C. Mesophyll
D. Bundle sheath

Answer

To answer the question regarding where malic acid formation during CO₂ fixation occurs in the leaves of C₄ plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding C₄ Photosynthesis**:
- C₄ plants have a unique mechanism for photosynthesis that differs from C₃ plants. They initially fix carbon dioxide into a four-carbon compound.

2. **Identifying the Cell Types in Leaves**:
- Leaves consist of various cell types, including epidermis, mesophyll, phloem, and bundle sheath cells. Each has specific functions in the plant.

3. **Role of Mesophyll Cells**:
- In C₄ plants, the mesophyll cells are responsible for the initial fixation of CO₂. They contain the enzyme phosphoenolpyruvate carboxylase (PEP carboxylase), which helps convert CO₂ into a four-carbon compound, typically oxaloacetate, which is then converted into malic acid.

4. **Formation of Malic Acid**:
- The malic acid formed in the mesophyll cells is then transported to the bundle sheath cells, where it undergoes further reactions in the chloroplasts to release CO₂ for the Calvin cycle.

5. **Conclusion**:
- Therefore, the correct answer to the question is that malic acid formation during CO₂ fixation occurs in the mesophyll cells of C₄ plants.

### Final Answer:
The correct option is **C) Mesophyll**.

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