After a discussion of active sites, allosteric sites, competitive and noncompetitive inhibition, discuss poisons and antidotes in general. Ask students how this relates to the antibiotic penicillin. Use an overhead transparency or a model of catalase, have students explain how shape accounts for the action they observed in the demonstration. Choose all that apply. After students have attempted to explain how a home hair permanent works, participated in guided discussion, and observed a model of the process, have them write a paragraph that explains the process.
Chickens have proteins in their eggs that function as enzymes.