1. Chapter 9 Test Review

2. How do organisms get the energy they need?
a. by breathing oxygen into the lungs and combining it with carbon dioxide
b. by using the sun’s energy to break down food molecules and form chemicals
c. by burning food molecules and releasing their energy as heat
d. by breaking down food molecules gradually and capturing their chemical energy

3. Glycolysis rearranges a 6-carbon glucose molecule into two 3-carbon molecules of ____________.

4. Based on the Figure, ____________ ATP molecules per glucose molecule are generated through fermentation.

5. What are the two types of fermentation?

6. Lactic acid fermentation occurs in
a. muscle cells.
b. mitochondria.
c. any environment containing oxygen.
d. bread dough.

7. The energy needed to win a 1-minute footrace is produced mostly by
breaking down fats.
b. using up stores of ATP
c. cellular respiration.
d. lactic acid fermentation.

8. Glycolysis alone nets only
Glycolysis alone nets only _________ molecules of ATP from each glucose molecule.

9. Which of the following is the correct sequence of events in cellular respiration?
a. glycolysis → fermentation → Krebs cycle
b. Krebs cycle → electron transport → glycolysis
c. glycolysis → Krebs cycle → electron transport
d. Krebs cycle → glycolysis → electron transport

10. Cellular respiration uses 1 molecule of glucose to produce approximately
a. 4 ATP molecules.
b. 36 ATP molecules.
c. 32 ATP molecules.
d. 2 ATP molecules.

11. Which of the following pass high-energy electrons to the electron transport chain?
a. acetyl–CoA
b. NADH and FADH2
c. citric acid
d. ATP and ADP

12. Breathing heavily after running a race is your body’s way of
stopping the electron transport chain.
b. restarting glycolysis.
c. making more citric acid.
d. repaying an oxygen debt.

13. The air bubbles and spongy texture of bread are due to which process?
the Krebs cycle
b. lactic acid fermentation
c. glycolysis
d. alcoholic fermentation

14. The starting molecule for glycolysis is
glucose.
b. ADP.
c. citric acid.
d. pyruvic acid.

15. Which of the following is NOT a stage of cellular respiration?
glycolysis
b. electron transport
c. Krebs cycle
d. light dependent cycle

16. When _____________ pass through ATP synthase, ATP molecules are produced from ADP molecules.

17. In eukaryotes, electron transport occurs in the
a. cell membrane.
b. cytoplasm.
c. nucleus.
d. inner mitochondrial membrane.

18. All of the following are sources of energy for humans during exercise EXCEPT
cellular respiration.
b. stored ATP.
c. lactic acid fermentation.
d. alcoholic fermentation.

19. Unlike photosynthesis, cellular respiration occurs in
prokaryotic cells only.
b. plant cells only.
c. all eukaryotic cells.
d. animal cells only.

20. Which of these is a product of cellular respiration?
oxygen
b. Water
c. glucose
d. lactic acid

21. Photosynthesis occurs only in plants, algae, and some bacteria
Photosynthesis occurs only in plants, algae, and some bacteria. In contrast, __________ occurs in all eukaryotic cells.

22. The Krebs cycle starts with
a. pyruvic acid and yields lactic acid.
b. pyruvic acid and yields carbon dioxide.
c. glucose and yields ATP.
d. lactic acid and yields carbon dioxide.

23. The Krebs cycle produces
oxygen.
b. glucose.
c. carbon dioxide.
d. lactic acid.

24. Only the pathway labeled _________ requires oxygen.

25. The body gets rid of lactic acid in a chemical pathway that requires

26. Cellular respiration is called an aerobic process because it requires
exercise.
b. light.
c. glucose.
d. oxygen.