Which is a wrong pair about `C_4` plants

Options

A. Mesophyll - Homogeneous
B. Chloroplasts - Dimorphism
C. PEP carboxylase - present in bundle sheath chloroplast
D. RUBISCO - present in abundance in Chloroplasts of bundle sheath cell

Answer

To solve the question regarding the wrong pair about C4 plants, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding C4 Plants**:
- C4 plants are adapted to hot, dry environments and have a unique photosynthetic pathway that involves two types of cells: mesophyll cells and bundle sheath cells. Examples include maize and sorghum.

2. **Analyzing Each Option**:
- **Option 1: Mesophyll Homogenous**:
- This refers to the nature of mesophyll cells in C4 plants. The mesophyll cells are indeed homogeneous in their structure and function, which is correct.

- **Option 2: Chloroplast Dimorphism**:
- In C4 plants, there are two types of chloroplasts: granule chloroplasts in mesophyll cells and agranular chloroplasts in bundle sheath cells. This is true, making this option correct.

- **Option 3: PEP Carboxylase Present in Bundle Sheath Chloroplast**:
- PEP carboxylase is an enzyme that catalyzes the first step of the C4 pathway, and it is located in the mesophyll cells, not in the bundle sheath cells. Therefore, this statement is incorrect.

- **Option 4: Rubisco Present in Abundance in Chloroplast of Bundle Sheath Cell**:
- Rubisco is indeed present in the bundle sheath cells where it plays a crucial role in the Calvin cycle. This statement is correct.

3. **Identifying the Wrong Pair**:
- Based on the analysis, the incorrect pair is **Option 3**, which states that PEP carboxylase is present in bundle sheath chloroplasts. This is false because PEP carboxylase is found in mesophyll cells.

### Final Answer:
The wrong pair about C4 plants is **Option 3: PEP carboxylase present in bundle sheath chloroplast**.

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