Respuesta :
we are given with the equation 2H2O2 --> 02 + 2H2O . In an equation, the right-hand side contains the products while the left-hand side consists of the reactants or substrate. In this case, the enzyme used to enhance the rate of the process is catalase. The answer hence is D. Catalase is an enzyme, O2 and H2O are products, and H2O2 is a substrate.