Which one is false about kranz anatomy

Options

A. Bundle sheath cells have large chloroplast and less developed grana.
B. Mesophyll cells have large chloroplast and more developed grana.
C. It is found in Atriplex, sugarcane, and maize.
D. Plants having it have better photosynthesizing power than `C_(3)` plants.

Answer

**Step-by-Step Solution:**

1. **Understand Kranz Anatomy**: Kranz anatomy is a specialized structure found in C4 plants. It involves a unique arrangement of cells around the vascular bundles, specifically the presence of bundle sheath cells.

2. **Identify the Characteristics of Bundle Sheath Cells**: In C4 plants, bundle sheath cells are characterized by having a larger number of chloroplasts compared to mesophyll cells. These chloroplasts are less developed in terms of grana.

3. **Evaluate the Statements**:
- **Statement 1**: "Bundle sheath cells have large chloroplasts and less developed grana."
- This statement is true because bundle sheath cells indeed have more chloroplasts and less developed grana.
- **Statement 2**: "Mesophyll cells have large chloroplasts and more developed grana."
- This statement is false. In C4 plants, mesophyll cells actually have fewer chloroplasts and less developed grana compared to bundle sheath cells.
- **Statement 3**: "It is found in Atriplex, sugarcane, and maize."
- This statement is true as all these plants are examples of C4 plants.
- **Statement 4**: "Plants having it have better photosynthesizing power than C3 because they do not perform photorespiration."
- This statement is true. C4 plants are more efficient in photosynthesis than C3 plants because they minimize photorespiration.

4. **Conclusion**: The false statement regarding Kranz anatomy is the second one: "Mesophyll cells have large chloroplasts and more developed grana."

**Final Answer**: The false statement about Kranz anatomy is: "Mesophyll cells have large chloroplasts and more developed grana."

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