Here's why:
* Cellulose is a structural polysaccharide: It's a long chain of glucose molecules linked together, forming strong fibers.
* It provides rigidity: These fibers create a rigid network within the cell wall, giving the plant cell its shape and structural support.
* It resists pressure: The cell wall, with its cellulose content, can withstand the pressure from the water inside the cell (turgor pressure), preventing the cell from bursting.
While other compounds like lignin and hemicellulose also play roles in cell wall structure, cellulose is the primary component responsible for the shape and support of plant cells.
