Cells are made up of compounds which interact and bond with each other to form specific structures, and react with each other to form energy or fuel. Although living organisms are extremely diverse, all are made up of one or more cells, and all cells share some certain biochemical properties.
Proteins are essential to the structure and enzymatic function of the cell.
Polymers are made up of smaller molecules, linked in a chain. This kind of reaction is called condensation, and is reversed by hydrolysis. In this experiment, yeast cells were studied. Yeast is an excellent organism to use because it is easy to store, and is very similar both structurally and compositionally to the individual cells of many multicellular organisms. The cells were fractionated into the constituent macromolecules.