Review Questions:
1. Define metabolism. What are the advantages of having metabolic pathways in a cell?
2. What are enzymes? Why are enzymes important?
3. Are enzymes specific?
4. How are enzymes named?
5. Why are enzymes absolutely necessary to the continued existence of a cell?
6. HOW do enzymes increase the rate of a reaction?
7. Describe what happens when an enzyme reacts with a substrate.
8. Where does the substrate fit onto the enzyme?
9. What happens to the enzyme after the reaction?
10. Describe the difference between the lock and key theory and the induced-fit model.
11. What is the difference between enzymatic reactions that bring about synthesis and those that bring about degradation?
12. Why will an increase in the substrate concentration cause an increase in the enzyme’s activity only up to a certain point?
13. What happens to an enzyme as the temperature continues to increase? If the pH continues to increase?
14. Define competitive inhibition. What is the difference between irreversible and reversible inhibition?
15. Define noncompetitive inhibition. What is the normal way by which metabolic pathways are regulated?
16. What are coenzymes? List 3 vitamins that are used in coenzymes.