Enzymes function as organic catalysts and a cell would not be able achieve homeostasis if the required enzymes were not present. Homeostasis refers to the maintenance of a stable internal environment and the presence of the proper enzymes within a cell is vital to the process.
Enzymes, which are proteins, enable the proper arrangement of molecules when the chemical reactions needed for homeostasis occur. How the enzyme functions is determined by its shape and the arrangement of its own molecules. The enzymes molecular arrangement and shape enable it to bring reactants within the cell closer together. This affects the chemical bonds with the reactants and enables the process to proceed faster than it would have without the enzyme acting as a catalyst.