Cell structure Description Function Cell type Cell wall Freely permeable layer surrounding cell membrane. The cell wall of plant cells is made from cellulose. This gives them a rigid structure.

The three-dimensional shape of a protein determines its function. This is because proteins ... catalyses the breakdown of ATP and Cellulose synthase: catalyses the formation of cellulose from ...

The size and shape of rosettes determine the structure and properties of the cellulose microfibrils they ... one of them usually takes on another function or is weeded out by natural selection.