Starch of guard cells is converted into PEP through

Options

A. Hydrolysis
B. Oxidation
C. Dephosphorylation
D. Decarboxylation

Answer

To answer the question "Starch of guard cells is converted into PEP through," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Components**:
- Starch is a polysaccharide made up of glucose units and is stored in guard cells.
- PEP (Phosphoenolpyruvate) is an important intermediate in various metabolic pathways, including photosynthesis and respiration.

2. **Identifying the Process**:
- The conversion of starch to PEP involves breaking down the starch molecules into simpler forms that can be further processed into PEP.

3. **Analyzing the Options**:
- **Hydrolysis**: This is the process of breaking down a compound by adding water, which can break the glycosidic bonds in starch.
- **Oxidation**: This involves the addition of oxygen or the removal of electrons, which is not directly related to starch conversion.
- **Dephosphorylation**: This refers to the removal of a phosphate group, which is not applicable in this context.
- **Decarboxylation**: This is the removal of a carboxyl group, which is also not relevant to the conversion of starch to PEP.

4. **Conclusion**:
- The correct process that converts starch into PEP is **hydrolysis**. During hydrolysis, starch is broken down into glucose units, which can then be converted into PEP through subsequent metabolic processes.

### Final Answer:
The starch of guard cells is converted into PEP through **hydrolysis**.

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