Primary wall is generally elastic due to absence of

Options

A. Lignin
B. Suberin
C. Cutin
D. Silica

Answer

**Step-by-Step Solution:**

1. **Understanding the Primary Cell Wall**: The primary cell wall is the first layer of the cell wall formed during cell division. It is flexible and allows for cell growth.

2. **Components of the Primary Cell Wall**: The primary cell wall is primarily composed of three main components:
- **Cellulose**: A polysaccharide that provides structural support.
- **Hemicellulose**: A complex carbohydrate that helps bind cellulose fibers together.
- **Pectin**: A gelatinous substance that provides additional support and helps in cell adhesion.

3. **Elasticity of the Primary Wall**: The elasticity of the primary cell wall is due to its composition. The presence of cellulose and hemicellulose allows for flexibility and growth.

4. **Absence of Lignin**: Lignin is a complex organic polymer found in the secondary cell wall, which provides rigidity and strength. The primary cell wall does not contain lignin, which is why it remains elastic.

5. **Conclusion**: Therefore, the primary wall is generally elastic due to the absence of lignin.

**Final Answer**: The primary wall is generally elastic due to the absence of lignin.

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