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a thick, rigid membrane that surrounds a plant cell. This layer of cellulose fiber gives the cell most of its support and structure. The cell wall also bonds with other cell walls to form the structure of the plant.
The functions of the cell wall in a plant cell are -

The cell wall acts as a protective layer for the cell. It gives rigidity and strength to the cell.

The cell wall is semipermeable and controls what enters and exits the cell.

The cell wall is flexible and allows for expansion of the cell when it absorbs water and mineral salts.

It helps to maintain the osmotic balance and prevents osmotic lysis (bursting of the cell due to excess water entering the cell).

It prevents the entry of molecules that may be toxic to the plant cell.

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