Enzymes are the critical ingredient in every organism that make life possible. They are catalysts and drive every chemical reaction that takes place in the human body, enabling our bodies to be built from proteins, carbohydrates, and fats. In this program we investigate the role of enzymes in detail, offering both theoretical and practical examples. We look at how enzymes function in living organisms, enzyme kinetics, enzyme substrate complex, enzyme activity, and finally the power of enzymes in the 21st century. We demonstrate enzyme activity, and the affects of substrate concentration, the pH, temperature and inhibitors.