In `C_(4)` plants, synthesis of sugars occurs in

Options

A. palisade cells.
B. spongy cells.
C. undifferentiated mesophyll cells.
D. bundle sheath cells.

Answer

To solve the question "In C4 plants, synthesis of sugars occurs in," we need to understand the C4 pathway and the specific cells involved in this process.

### Step-by-Step Solution:

1. **Understanding C4 Plants**:
- C4 plants utilize a specific pathway for photosynthesis that is different from C3 plants. This pathway is adapted to efficiently fix carbon dioxide in conditions of high light intensity and temperature.

2. **Identifying Key Cells**:
- In C4 plants, there are two main types of cells involved in the photosynthetic process:
- **Mesophyll Cells**: These cells are responsible for the initial fixation of carbon dioxide. They convert CO2 into a four-carbon compound (oxaloacetate) using phosphoenolpyruvate (PEP).
- **Bundle Sheath Cells**: These cells surround the vascular bundles and are where the Calvin cycle occurs, leading to the synthesis of sugars.

3. **Process of Sugar Synthesis**:
- In the mesophyll cells, CO2 is fixed into a four-carbon compound (oxaloacetate), which is then converted to malate.
- The malate is transported to the bundle sheath cells, where it releases CO2.
- The released CO2 is then used in the Calvin cycle within the bundle sheath cells to synthesize glucose.

4. **Conclusion**:
- Since the final synthesis of sugars (like glucose) occurs in the bundle sheath cells, the correct answer to the question is **bundle sheath cells**.

### Final Answer:
The synthesis of sugars in C4 plants occurs in **bundle sheath cells**.

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