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CH. 8 STUDY GUIDE: METABOLISM KEY WORDS free energy activation energy 1st Law of Thermodynamics enzyme 2nd Law of Thermodynamics substrate exergonic active site endergonic induced fit hypothesis kinetic energy coenzymes and cofactors thermal energy competitive inhibition equilibrium constant noncompetitive inhibition coupled reactions feedback inhibition catalyst cooperativity ATP Catabolic Allosteric regulation QUESTIONS 1. Cells Preform Three main types of work. List all three and provide an example of each. 2. Where is the energy from ATP coming from? Be specific and explain. 3. Explain what is meant by activation energy and why the activation-energy barrier provides stability for high energy molecules. 4. Draw the ATP Cycle. 5. What is a transition state? How does it relate to reaction energy? 6. List and describe the ways in which enzymes lower activation energy. 7. Describe catalysis at the active site. 8. Explain the function and process involved with a. cofactors b. inhibitors 9. Explain how toxins and poisons can attach to enzymes and discuss how they can be so harmful. 10. Describe the process of allosteric regulation. Be specific and include a description of cooperativity. 11. What is Feedback inhibition? Why is it important to regulation? 12. Draw the graph for an exergonic reaction with and without an enzyme catalyst. Label the reactants, products, activation energy, transition state, the delta G, and both axis. Do not forget to give your graph a title.