This is the most abundant enzyme in the mesophyll

Options

A. Hexokinase
B. RUBISCO
C. Fructose 6 phosphatase
D. Sedoheptulose 7 phosphatase

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the most abundant enzyme found in the mesophyll of plants. The mesophyll is the tissue in the interior of leaves where photosynthesis occurs.

2. **Identifying the Role of Enzymes in Photosynthesis**: In the process of photosynthesis, carbon dioxide (CO2) is fixed into organic molecules. This process primarily occurs in the mesophyll cells.

3. **Recognizing the Key Enzyme**: The enzyme that plays a crucial role in the fixation of CO2 during photosynthesis is known as RuBisCO.

4. **Defining RuBisCO**: The full name of RuBisCO is Ribulose-1,5-bisphosphate carboxylase/oxygenase. It catalyzes the first major step of carbon fixation, which is essential for the conversion of inorganic CO2 into organic compounds.

5. **Conclusion**: Since RuBisCO is responsible for CO2 fixation in the mesophyll and is present in high abundance due to its critical role in photosynthesis, it is the most abundant enzyme found in the mesophyll.

6. **Final Answer**: The most abundant enzyme in the mesophyll is RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase).

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