1. Metabolism and Enzymes(2.5) Part 1
Pre – AP Biology
Metabolism and Enzymes(2.5)
Part 1

2. Metabolism

3. Kinetic Energy vs. Potential Energy

4. Potential Energy vs. Kinetic Energy in Chemical form

5. Potential Energy vs. Kinetic Energy as it happens in the environment

6. Thermodynamics and Material recycling Red = Energy flow Blue = chemical element flow

7. The making and using of ATP is a constant recycling process
The making and using of ATP is a constant recycling process. It needs free energy released from our food to keep going

8. Free energy from our food molecules is use to produce ATP
Free energy from our food molecules is use to produce ATP. ATP is then used to power cellular processes by providing phosphates (known as phosphorylation)

9. Think About It!
Read the following experiment and think about the missing information.

10. Becky conducted an experiment to determine if enzyme concentration had an effect on the rate at which Hydrogen Peroxide (H2O2) is decomposed to water (H2O) and Oxygen gas (O2). The enzyme she used in her experiment is Catalase, found in liver cells. She used a graduated cylinder to pour 50 mL of H2O2 into each of mL beakers. She then used another graduated cylinder to add 10 mL of Catalase, of vary concentrations, into each beaker. She stopped the reaction after 1 minute, using Hydrochloric Acid (HCl) to denature the Catalase, and then measured the amount of H2O2 that remained in the beakers.
Beaker #
Catalase Concentration (%)
Initial Hydrogen Peroxide (mL)
Final Hydrogen Peroxide (mL) 1 50 10 2 15 3 27 4 43 5

11. Which of the following concentrations would correspond to beaker 1?
0% solution of catalase
25% solution of catalase
50% solution of catalase
100% solution of catalase

12. Which of the following concentrations would correspond to beaker 5?
0% solution of catalase
25% solution of catalase
50% solution of catalase
100% solution of catalase

13. Which of the following concentrations would serve as the control in the experiment?
0% solution of catalase
25% solution of catalase
50% solution of catalase
100% solution of catalase

14. Metabolism and Enzymes(2.5) Part 2
Pre – AP Biology
Metabolism and Enzymes(2.5)
Part 2

15. Nature versus Enzymes in promoting chemical reactions
Nature versus Enzymes in promoting chemical reactions. Enzymes reduce the Energy of Activation and thus speed up the rate of chemical reactions.

16. Enzyme Active site interacting with a substrate molecule.

17. Optimal Performance

18. Denaturation of a enzyme What bonds do you think broke allowing this to happen?

19. Inhibitor molecules They slow down or stop the chemical reaction rate

20. Feedback Inhibition See a product molecule going back and inhibiting the enzymes ability to work?