The part of the plant cell that is made of a cellulose structure is the cell wall.
The cell wall is a rigid outer layer that surrounds the cell membrane in plant cells. It provides structural support, protection, and helps in regulating water intake. Cellulose is a complex carbohydrate made up of long chains of glucose molecules, and it is the main component of the cell wall. This composition gives the cell wall its strength and rigidity, allowing plants to maintain their shape and resist external pressures.
In addition to cellulose, the cell wall may also contain other components like lignin and pectin, which further enhance its properties. However, it is the cellulose fibers that primarily contribute to its structural integrity. The presence of the cell wall is a key feature that distinguishes plant cells from animal cells, which do not have a cell wall and are only surrounded by a flexible cell membrane.