Question

What are the roles of hydrogen peroxide, oxygen, and catalase in the chemical reaction? 2H2O2-->O2 +2H2O
1. catalase is an enzyme, O2 and H2O are substrates, and H2O2 is a reactant.
2. catalase is a substrate, O2 and H2O are substrates, and H2O is an enzyme.
3.catalase is a substance, O2 and H2O are products, and H2O2 is an enzyme.
4. catalase is an enzyme, and H2O are products, and H2O2 is a substrate.