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Biology
Chapter 9.3 Worksheet
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ATP, GLYCOLYSIS, & FERMENTATION
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1. Fill in the following table with the best possible answers for each stage of cell respiration.
Glycolysis
Citric Acid Cycle
Electron Transport Chain
Inputs:
Outputs:
Net Gain:
*Only applies to
Glycolysis since
this has the only
input of ATP*
When the stage
occurs:
Where the stage
occurs:
2. What is the role of ATP in organisms?
3. Explain how ATP is an energy carrier while ADP is not.
4. What molecule does ATP provide energy for?
5. What is the structural difference between ADP and ATP?
6. What are the reactants of cell respiration? What are the products of cell respiration?
7. What molecule does glycolysis begin with?
8. Put the following events of Glycolysis in order that they occur:
a. Two 3-carbon molecules called PGAL are formed
b. Two molecules of pyruvic acid are produced.
c. An ADP is transformed into an ATP
d. An ATP is used to provide energy.
e. NAD+ is transformed into NADH
9. What is the difference between aerobic and anaerobic respiration? What processes are involved in each type of
respiration?
10. Describe what happens in the intermediate step of cell respiration.
11. When carbons are removed in the citric acid cycle, what molecule do they form?
12. Why are NADH and FADH2 called electron carriers?
13. What is the role of each of the following molecules in the electron transport chain.
a. Carrier Proteins
b. Electron
c. Hydrogen
d. ATP synthase
14. Explain how does diffusion and equilibrium help the cell produce ATP with ATP synthase?
15. How many ATP molecules, on average do we get from one molecule of NADH? FADH2? Glucose?
16. Fill in the following table with the best possible answers for each type of fermentation
Alcoholic Fermentation
Lactic Acid Fermentation
Inputs:
Outputs:
When the stage
occurs:
Where the stage
occurs:
17. If oxygen is not present, what is the pathway a glucose molecule will take?
a. Glucose  Glycolysis  Citric Acid Cycle Electron Transport Chain  Fermentation
b. Glucose  Glycolysis  Citric Acid Cycle  Fermentation
c. Glucose  Glycolysis  Fermentation
d. Glucose Fermentation
18. What organisms are able to undergo alcoholic fermentation?
19. What is the purpose of fermentation?
20. Name at least two foods humans consume that are made using alcoholic fermentation.
21. What chemical do our muscles use to get rid of NADH and continue glycolysis?
22. Why does your body force you to breathe hard after anaerobic fermentation?