Do you know what an enzyme is? Enzymes are molecules whose role is to catalyze the chemical reactions of living things. Like any catalyst, an enzyme increases the speed of a chemical reaction without being consumed. The students in Premiere majoring in Biology carried out Computer Assisted Experiments (EXAO) with peroxidase, an enzyme extracted from turnip, to understand how this enzyme works, by measuring the speed of the reaction it catalyzes under different experimental conditions.