Enzymes' Enzymes are biological catalysts. A catalyst is defined as a substance that increases the rate of a chemical reaction without itself undergoing any permanentchange. Enzymes do precisely this in living things. Without them, the rate of the reactions would be so slow as to cause serious, if not fatal, damage. Enzymes have two main functions: To act as highly specific catalysts, and also to provide a way of controlling reactions, the amount of enzyme …showed first 75 words of 1238 total…

…showed last 75 words of 1238 total…be formed. As there are more active sites, and the rate of reaction increases. Eventually, increasing the substrate concentration yet further will have no effect. The active sites will be saturated so no more enzyme-substrate complexes can be formed. We call this the point of optimal concentration. Enzymes are extremely valuable biological catalysts to living organisms as they control biological processes and allow them to take place in the conditions, which occur inside living organisms.