Name the chief constituent of plant cell wall.

Explanation

**Step-by-Step Solution:**

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

2. **Function of the Cell Wall**: The primary functions of the plant cell wall include providing strength, maintaining cell shape, and protecting against mechanical stress.

3. **Identifying the Chief Constituent**: The main component that makes up the plant cell wall is a type of carbohydrate known as a polysaccharide.

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