Which of the following is not correctly matched?

Options

A. Calvin cycle in bundle sheath cells - Maize
B. HSK pathway -OAA
C. Photorespiration - Less productivity
D. RuBisCO - kranz anatomy

Answer

To solve the question "Which of the following is not correctly matched?", we will analyze each option provided in the question step by step.

### Step 1: Analyze the first option
- **Calvin Cycle in Bundle Sheath Cells**:
- The Calvin Cycle is indeed associated with the bundle sheath cells in C4 plants.
- This option is correctly matched.

### Step 2: Analyze the second option
- **HSK Pathway with OAA (Oxaloacetic Acid)**:
- The HSK pathway, also known as the HES-LAC pathway, involves the formation of oxaloacetic acid (OAA) in the mesophyll cells of C4 plants.
- This option is also correctly matched.

### Step 3: Analyze the third option
- **Photorespiration and Less Productivity**:
- Photorespiration is known to result in less productivity because it competes with photosynthesis and leads to the loss of fixed carbon.
- This option is correctly matched as well.

### Step 4: Analyze the fourth option
- **Rubisco with Kranz Anatomy**:
- Rubisco (Ribulose bisphosphate carboxylase/oxygenase) is an enzyme involved in the Calvin Cycle, but it is not specifically matched with Kranz anatomy. Kranz anatomy refers to the specialized structure of C4 plants where bundle sheath cells surround the vascular bundles, and while Rubisco is present in these cells, the pairing is not accurate.
- Therefore, this option is incorrectly matched.

### Conclusion
After analyzing all the options, the answer to the question "Which of the following is not correctly matched?" is:
- **Option 4: Rubisco with Kranz Anatomy** is the incorrectly matched pair.

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