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Chapter 9 Key Concepts
AP BIG IDEA 2, SB3a
Cellular Respiration
Chapter 9 Guided Reading Notes
You are required to watch the videos as well for the quiz. Videos are located on the website.
Concept 9.1: Catabolic pathways yield energy by oxidizing organic fuels
1. Describe the following catabolic processes:
a. Fermentation
b. Aerobic respiration
c. Cellular respiration
2. Write the cellular respiration equation.
3. Why is cellular respiration considered exergonic?
4. Summarize in your own words what occurs during
redox reaction.
5. What molecule is oxidized in cellular respiration?
What is the product of this oxidation?
6. Which molecules are reduced? What is product of this reduction?
7. What is the role of the coenzyme NAD+ in cellular respiration?
8. What is the purpose of an electron transport chain?
9. Preview of the stages in the process of cellular respiration
Glycolysis
Location of Stage
Reactants
Products
Summary
Citric Acid Cycle (formerly
known as the Krebs Cycle)
Oxidative
Phosphorylation
ETC and Chemiosmosis
10. Explain what occurs in substrate level phosphorylation and how it is different from oxidative phosphorylation.
Concept 9.2: Glycolysis harvests chemical energy by oxidizing glucose to pyruvate
11. Briefly summarize what happens during the process of glycolysis.
****For the LOVE OF SCIENCE and Everything Catalytic and Enzymatic****
Concept 9.3: The citric acid cycle complete the energy –yielding oxidation of
organic molecules
12. Using figure 9.10, explain the conversion of pyruvate in the cytosol to
acetyl CoA in the mitochondria.
13. Describe the inputs and outputs of the citric acid cycle using figure 9.11.
You need to understand the general cycle; you do not need to memorize
the depth as depicted in figure 9.12.
Citric Acid
Cycle
Concept 9.4: During oxidative phosphorylation,
chemiosmosis couples electron transport to ATP synthesis
14. What are the generalized roles of the following
molecules in the ETC?
a. Cytochromes
b. FADH2
c. NADH
15. How does ATP synthase make ATP from ADP
and inorganic phosphate?
16. Define chemiosmosis.
17. What is the major function of the ETC of the mitochondrial membrane?
18. About how many ATP are made from one glucose molecule during the process of cellular respiration?
19. What three reasons are given to explain the inexact amount of ATP produced?
Concept 9.5: During oxidative phosphorylation, chemiosmosis couples electron transport to ATP synthesis
20. Compare the two types of fermentation
21. Fermentation and aerobic respiration are similar in the fact that…
22. Key differences of
fermentation and aerobic
respiration are…
23. Define obligate
anaerobes
24. Define facultative
anaerobes
25. What is the evolutionary
significance of glycolysis?
Concept 9.6: Glycolysis and the citric acid cycle connect to many other metabolic pathways
26. Since free glucose molecules are not readily available in many animals other molecules are used to make ATP.
Explain how proteins, fats and other carbohydrates lead to oxidative phosphorylation.
27. How do allosteric enzymes inhibit cellular respiration?
****There is no enzyme function table --- you do not have to know the steps in that great of detail!****
Self Quiz:
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Answer question #10 on page 184.
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