Dobule carboxylation with spatial differnece is characteristic of

Options

A. triticum
B. pisum
C. Saccharum
D. Bryophyllum

Answer

**Step-by-Step Solution:**

1. **Understanding Double Carboxylation**:
- Double carboxylation refers to a process where carbon dioxide (CO2) is fixed twice during photosynthesis. This is a characteristic feature of C4 plants.

2. **Identifying C4 Plants**:
- C4 plants utilize a different pathway for photosynthesis compared to C3 plants. In C4 plants, the initial fixation of CO2 occurs in the mesophyll cells, where phosphoenolpyruvate (PEP) combines with CO2 to form oxaloacetate. This reaction is catalyzed by the enzyme PEP carboxylase.

3. **Analyzing the Options**:
- The options given are: Triticum (wheat), Pisum (pea), Sacrum (sugarcane), and Bryophyllum.
- Triticum, Pisum, and Bryophyllum are all examples of C3 plants, which do not utilize the double carboxylation pathway.

4. **Identifying the Correct Answer**:
- The only plant listed that is a C4 plant is Sacrum (sugarcane). Therefore, it is the correct answer to the question.

5. **Conclusion**:
- Double carboxylation with spatial difference is characteristic of Sacrum (sugarcane).

**Final Answer**: Sacrum (sugarcane).

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