Plant cell wall mainly cansists of

Options

A. Cellulose
B. Protein
C. Starch
D. None of the above.

Answer

**Step-by-Step Solution:**

1. **Understanding the Plant Cell Wall**: The plant cell wall is a rigid outer layer that provides structural support and protection to the plant cells.

2. **Identifying Main Components**: The primary components of the plant cell wall need to be identified. The options provided are cellulose, protein, starch, and none of the above.

3. **Analyzing Each Option**:
- **Cellulose**: This is a polysaccharide made up of glucose units linked by beta-1,4-glycosidic bonds. It is the main structural component of the plant cell wall.
- **Protein**: While proteins may be present in the cell wall, they are not the main component.
- **Starch**: This is a storage carbohydrate in plants, not a structural component of the cell wall.
- **None of the Above**: This option is incorrect as cellulose is indeed a major component.

4. **Conclusion**: Based on the analysis, the plant cell wall mainly consists of cellulose, which is a complex sugar and a polysaccharide.

5. **Final Answer**: The plant cell wall mainly consists of cellulose.

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