Name _______________________________________Chapter 6: Introduction to Metabolism

Section 6.11. Define Metabolism

2. What is a metabolic pathway?

3. Contrast the catabolic and anabolic pathways & then give an example of each.

4. Define the following forms of energy a. Energy

b. Kinetic energy

c. Heat/thermal energy

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d. Potential energy

e. Chemical energy

5. Label the diagram below in terms of the type of energy being illustrated

6. Define the following terms related to Thermodynamics & give an example of each.a. Thermodynamics

b. First Law of Thermodynamics

c. Entropy

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d. Second Law of Thermodynamics

7. Explain the difference between a spontaneous and nonspontaneous process and how these terms relate to entropy

8. Energy flows into most ecosystems as __________________ & exits as __________________

Section 6.29. What is free energy and the symbol Gibbs assigned to it?

10. State Gibbs Free Energy equation and what each symbol means

∆G∆H∆ST

11. What is the importance of ∆G?

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12. Respiration breaks glucose down into 6CO2, 6H2O and 36-38 ATP molecules. It has a ∆G of -686kcal. What does that mean?

13. What is chemical equilibrium?

14. Label the diagram below showing the relationship of free energy to stability, work capacity & spontaneous change

15. Contrast exergonic and endergonic reactions in terms of: free energy, stability, capacity to do work.

16. Identify each of the following as either an exergonic or an endergonic reaction and explain your logic:a. Respiration

b. Photosynthesis

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c. Dehydration synthesis

d. Hydrolysis

e. Protein Synthesis

16. Can a closed system at equilibrium do work? Why or why not?

Section 6.317. List and give an example of the three main kinds of cellular work (done by ATP).

18. What is energy coupling?

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19. Label the diagram below and indicate how cellular work is done by ATP.

20. Why is do the bonds between the 3 phosphate groups carry so much energy in them?

21. Define phosphorylation in terms of ATP & then label the diagram below of the ATP cycle

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22. In your own works, explained the concept of coupled reactions and ATP doing work.

23. What is the relationship between exergonic reactions, endergonic reactions and the use and regeneration of ATP?

Section 6.424. What is activation energy?

25. Label the diagrams below including the change in free energy (∆G)

26. Discuss what enzymes do to the activation energy (EA) needed for a reaction to occur.

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27. Label the diagram below showing the effects of an enzyme on EA

28. Define the following new terms which relate to enzymes:a. Cofactors

b. Coenzymes

29. Compare and contrast competitive and noncompetitive inhibitors.

30. Label the diagram below of enzyme activity inhibition

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Section 6.531. What is allosteric regulation and how does assist in the regulation of metabolism?

32. What is cooperativity?

33. Label the diagram below illustrating allosteric regulation of enzyme activity

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34. How does feedback inhibition work?

35. Label the diagram below illustrating the feedback mechanism involved in isoleucine synthesis

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