Use the graph and your knowledge of enzymes to identify the three true statements about enzymes.
Enzymes lower the overall energy input needed for a reaction to occur.
By binding to reactant molecules, enzymes make it easier for the bonds in the molecules to break apart.
Only reactions that are controlled by enzymes require activation energy.
Chemical reactions cannot occur without enzymes.
Reactants cannot convert to products without an initial input of energy to start the reaction.