Suberin is a fatty acid alkaloid. It makes cork

Options

A. impermeable to water
B. permeable to gases
C. fiexible
D. stretchable

Answer

**Step-by-Step Solution:**

1. **Understanding Suberin**: Suberin is a complex polyester that is found in the cell walls of cork cells. It is primarily composed of fatty acids and is known for its hydrophobic properties.

2. **Properties of Suberin**: Suberin is lipophilic, meaning it has an affinity for lipids (fats) and is hydrophobic (repels water). This characteristic is crucial for its function in cork cells.

3. **Function of Cork**: Cork is made up of dead cells that serve as a protective barrier for plants. The presence of suberin makes cork impermeable to water, which helps prevent water loss and protects the plant from pathogens.

4. **Analyzing the Options**:
- **Option 1: Impermeable to water** - This is true because suberin prevents water from passing through the cork.
- **Option 2: Permeable to gaseous** - This is incorrect as suberin does not allow gases to pass freely.
- **Option 3: Flexible** - Cork is not flexible due to the rigid structure formed by suberin.
- **Option 4: Stretchable** - Cork is also not stretchable; it is a rigid material.

5. **Conclusion**: Based on the properties of suberin and the function of cork, the correct answer is that suberin makes cork impermeable to water.

**Final Answer**: Suberin makes cork impermeable to water.

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