In an experiment, a student mixed a substrate and an enzyme. which statement best explains the reaction?
a) the enzyme binds to the active sites on other enzymes.
b) the substrate binds to the non-active sites of the enzyme.
c) the substrate acts as a coenzyme that catalyzes the reaction.
d) the enzyme and the substrate form an enzyme-substrate complex.

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls