Cellular Respiration Review
Use paper and pencil to answer the questions. You can check your answers at
the end.
#1. Name the molecule that acts as the last electron acceptor for electrons moving down the
Electron Transport Chain during Cellular Respiration.
#2. A = ?
#3. B = ?
#4. C = ?
#5. D = ?
Image modified from:
Pearson Education Inc, publishing as Pearson Prentice Hall © 2006
#6. E = ?
#7. Name the 3 pathways that make up cellular respiration.
#8. Name the 2 pathways that pyruvic acid might follow if oxygen is NOT available.
#9. Name the TWO high energy electron carriers used during cellular respiration.
#10. Write the equation for cellular respiration.
#11. How is this related to the equation for photosynthesis?
#12. Which of these is the place
where H+ ions build up during
Electron Transport?
#13. Which of these is the place
where the Electron Transport chain
are located?
Image modified from:
Pearson Education Inc, publishing as Pearson Prentice Hall © 2006
#14. Which of these is the place
where the Krebs cycle happens?
#15. Name the enzyme that spins as H+ ions pass through it providing energy to add a
phosphate group to ADP.
#16. Write the equation for alcoholic fermentation.
#17. Which of these processes DOES NOT use alcoholic fermentation?
A. yeast making beer
B. bacteria making wine
C. yeast making bread rise
D. bacteria making cheese or yogurt
#18. How many ATP’s are produced from 1 glucose molecule completing cellular respiration ?
#19. Name this missing ? molecule.
#20. Where will this Acetyl-CoA molecule go next?
Image by Riedell
#21. Name the 3 carbon molecule that forms when glucose is split in half during glycolysis.
#22. Name the 6 carbon molecule that forms during the first step of the Krebs cycle.
#23. Fermentation is said to be ________________ because it happens “NOT IN AIR” or
without oxygen.
24. Compare NADH and FADH2 in terms of their ability to produce ATP’s using the electron
transport chain.
#25. Name the pathway used by muscle cells during short vigorous exercise like the 50 yard
#26. How many ATP’s are produced using glycolysis and lactic acid fermentation?
#27. What happens to the NADH molecules produced during glycolysis?
#28. What decides which pathway pyruvic acid follows after glycolysis?
#29. Where do the 6 carbons in glucose end up following cellular respiration?
#30. Which molecule is regenerated during fermentation that allows cells without oxygen to
continue to make ATP using glycolysis?
#31. Which stage of cellular respiration generates the most ATP molecules?
#33. What happens to Coenzyme A (Co-A)
once Acetyl-CoA reacts to form citric acid?
Image by Riedell
#32. Tell the products of cellular respiration.
#33. Name the two molecules you learned about that can be burned for energy during
extended exercise when glucose runs out.
outer membrane
intermembrane space
inner membrane
glycolysis, Krebs cycle,
Electron Transport chain
8. alcoholic or lactic acid
9. NADH or FADH2
10. C6H12O6+ 6 O2 → 6 CO2 + 6 H2O
11.opposite of photosynthesis
12. B
13. C
14. D
15. ATP synthase
16. Pyruvic acid + NADH →alcohol + CO2+ NAD+
17. D. making cheese uses lactic acid fermentation
18. 36
19. Co-enzyme A (Co-A)
20. go into Krebs cycle
21. pyruvic acid (pyruvate)
22. citric acid
23. anaerobic
24. 1 NADH makes 3 ATP; 1 FADH2 makes 2 ATP
25. lactic acid fermentation
26. lactic acid fermentation makes 2 ATP
27.Go to Electron transport
28.presence of oxygen
29. given off as CO2
30. need to regenerate NAD+ to keep glycolysis going
31. Electron Transport Chain
32. recycles to pick up a new pyruvic acid
33. CO2 and H2O and energy (ATP)
35. glycogen and fat

Cellular Respiration Review