nat 5 biology

define these terms

Enzyme

Enzymes function as biological catalysts and are made by all living cells. They speed up cellular reactions and are unchanged in the process.

cell wall

Rigid structure around cell membrane made of cellulose. Supports and strengthens the cell. Found in Plant, fungal, bacterial cells.

Cell membrane

Selectively permeable membrane made of phospholipids and proteins that surrounds the cell, controlling the movement of substances in and out. Found in all cell types.

Cytoplasm

1