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Name: AP Bio Date: ENZYME ACTIVITY AND REGULATION Directions: You are going to view a series of on-line animations to help you better understand enzymes. Log onto http://www.4teachers.org/ and click onto Track Star icon along the right margin. View Track # 240347. The password is “ferg”. You should view the track in text. Visit each of the sites; then complete the questions that follow. Questions: I. Describe activation energy. Discuss the effect an enzyme has on activation energy in a chemical reaction. II. Compare the lock and key model with the induced fit model. III. Describe the effects of the following on enzyme activity: a. pH b. temperature c. salt concentration d. concentration of enzyme or substrate e. cofactors IV. What is a metabolic pathway? How does it work? Describe feedback inhibition. V. What is an allosteric enzyme? Describe its structure. How does it regulate enzyme activity? VI. Describe the difference between : a. Competitive and non-competitive inhibition b. Reversible and irreversible inhibition c. How can drugs be utilized as enzyme inhibitors? Give an example. VII. Do the virtual lab and answer the questions in the journal. Print this page and turn in with your answers to the above.