Enzyme which is connected with stomatal opening is

Options

A. Pyruvic kinase
B. Cytochrome oxidase
C. PEP carboxylase
D. RuBisCO

Answer

**Step-by-Step Solution:**

1. **Understanding Stomatal Opening**: Stomata are small openings on the surfaces of leaves that allow for gas exchange. The opening and closing of these stomata are regulated by guard cells.

2. **Role of Guard Cells**: When guard cells take up water, they become turgid (swollen), which causes the stomata to open. Conversely, when they lose water, they become flaccid (soft), leading to the closing of the stomata.

3. **Identifying the Enzyme**: The question asks for the enzyme associated with stomatal opening. The enzyme that plays a crucial role in this process is PEP carboxylase.

4. **Conclusion**: Therefore, the enzyme connected with stomatal opening is PEP carboxylase.

5. **Final Answer**: The correct option is option 3: PEP carboxylase.

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