In `C_(4)` plants, Calvin cycle operates in

Options

A. Grana of mesophyll chloroplasts
B. Stroma of chloroplasts in mesophyll cells
C. Bundle sheath cells chloroplasts
D. All statements wrong

Answer

**Step-by-Step Solution:**

1. **Understanding C4 Plants**: C4 plants are a type of plant that utilize a specific photosynthetic pathway. The name "C4" refers to the fact that the first stable product of carbon fixation in these plants is a four-carbon compound, specifically oxaloacetic acid.

2. **Photosynthesis Pathway**: In C4 plants, the process of photosynthesis is divided into two main stages: the initial fixation of CO2 and the Calvin cycle. The initial fixation occurs in the mesophyll cells, where CO2 is combined with phosphoenolpyruvate (PEP) to form oxaloacetic acid.

3. **Kranz Anatomy**: C4 plants exhibit a unique leaf structure known as Kranz anatomy. This structure consists of two types of chloroplasts: those in the mesophyll cells and those in the bundle sheath cells.

4. **Location of the Calvin Cycle**: The Calvin cycle, which is responsible for synthesizing glucose from carbon dioxide, occurs in the bundle sheath cells. This is where ribulose-1,5-bisphosphate carboxylase/oxygenase (RUBISCO) is located, which is essential for the Calvin cycle to function.

5. **Conclusion**: Therefore, in C4 plants, the Calvin cycle operates specifically in the bundle sheath cells.

**Final Answer**: In C4 plants, the Calvin cycle operates in the bundle sheath cells.

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