Multiple Choice Review- Energy Processing
1. Catabolic pathways
a. Release energy by breaking down complex molecules into simpler
molecules
b. Consume energy by breaking down complex molecules into simpler
molecules
c. Release energy by building complex molecules from simpler
molecules
d. Consume energy by building complex molecules from simpler
molecules
2. A spontaneous reaction is one that
a. Happens quickly in one direction only
b. Happens quickly in the forward and reverse reactions
c. Occurs without outside intervention and in one direction only
d. Occurs without outside intervention and in the forward and reverse
directions
3. A spontaneous reaction will occur when ∆G is
a. Positive
b. Negative
c. Zero
d. Positive or zero
4. An endergonic reaction has a ∆G that is
a. Positive
b. Negative
c. Zero
d. Positive or Zero
5. An exergonic reaction is a reaction that
a. Occurs spontaneously with a negative ∆G
b. Does not occur spontaneously and has a negative ∆G
c. Occurs spontaneously with a positive or zero ∆G
d. Does not occur spontaneously and has a positive or zero ∆G
6. In an endergonic reaction
a. The reactants have more free energy than the products
b. The products have more free energy than the reactants
c. The reactants and products have equal amounts of free energy
d. Free energy is released
7. A spontaneous reaction
a. Occurs only when an enzyme or other catalyst is present
b. Releases free energy when proceeding in the forward direction
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c. Is common in anabolic pathways
d. Leads to a decrease in the entropy of the universe
8. Which of the following correctly states the relationship between catabolic
and anabolic pathways?
a. Anabolic pathways synthesize more complex organic molecules using
the energy derived from catabolic pathways
b. Degradation of organic molecules by anabolic pathways provides the
energy to drive catabolic pathways
c. Energy derived from catabolic pathways is used to drive the
breakdown of organic molecules in anabolic pathways
d. Synthesis of complex organic molecules in anabolic pathways is used
to drive the breakdown of complex molecules in catabolic pathways
9. Anabolism is to catabolism as ____________________ is to ________________________.
a. spontaneous; exergonic
b. endergonic; exergonic
c. order; entropy
d. entropy; free energy
10. Which of the following is not one of the three main types of work done by
cells?
a. Chemical
b. Signaling
c. Transport
d. Motion
11. Which of the following is the currency of energy in organisms?
a. DNA
b. RNA
c. ATP
d. AMP
12. When changing from ADP to ATP:
a. A phosphate group is lost
b. The phosphate groups are attracted to one another
c. An input of energy is required
d. This is an exergonic reaction
13. What process breaks the bonds between phosphates in ATP?
a. Dehydration synthesis
b. Phosphorylation
c. Electrostatic repulsion
d. Hydrolysis
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14. Which of the following is not true?
a. The energy used to phosphorylate ADP comes from anabolic reactions
in the cell
b. When ATP releases a phosphate and becomes ADP energy is released
c. ATP is a renewable resource
d. The result of a reaction coupled with the formation of ATP is
exergonic
15. Which of the following is not an example of the cellular work accomplished
with the free energy derived from the hydrolysis of ATP?
a. Mechanical work; such as muscle contraction
b. Transport work; such as that done by transport proteins in the
membrane
c. Production of heat; used to maintain homeostasis of the cell
d. Chemical work; such as the synthesis of a new protein
16. Oxidation is
a. The addition of electrons to a molecule
b. The addition of protons to a molecule
c. The loss of electrons from a molecule
d. The loss of protons from a molecule
17. What molecules are necessary for aerobic cellular respiration?
a. Glucose and Oxygen
b. Glucose and Carbon Dioxide
c. Carbon Dioxide and Water
d. Water and Oxygen
18. Which process occurs in both aerobic and anaerobic respiration
a. Citric Acid Cycle
b. Fermentation
c. Pyruvate Dehydrogenase Complex
d. Glycolysis
19. The process of glycolysis does not require
a. NADH
b. ATP
c. Glucose
d. Oxygen
20. Since fermentation occurs in the absence of oxygen, it is
a. Anaerobic
b. Aerobic
c. Cyclic
d. Noncyclic
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21. Which substance is needed to begin the process of glycolysis?
a. Pyruvate
b. Solar Energy
c. ATP
d. NADH
22. Six molecules of glucose would give a net yield of __________ ATP following
glycolysis.
a. 6
b. 12
c. 18
d. 24
23. How many pyruvate molecules are generated by the glycolysis of 3 glucose
molecules?
a. 1
b. 3
c. 6
d. 12
24. The buildup of lactic acid in muscle cells is caused by
a. The Citric Acid Cycle
b. The Calvin Cycle
c. Alcoholic fermentation
d. Lack of oxygen
25. Which of these is not true of fermentation?
a. Follows glycolysis
b. NADH donates electrons to the electron transport chain
c. Starts with glucose
d. Carried out by yeast
26. In which stage of aerobic cellular respiration is glucose broken down into
two molecules of pyruvate?
a. Oxidative Phosphorylation
b. Citric Acid Cycle
c. Pyruvate Dehydrogenase Complex
d. Glycolysis
27. Which of the following is not a product of anaerobic respiration?
a. Water
b. Alcohol
c. Carbon Dioxide
d. Lactic Acid
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28. Most of the CO2 from aerobic respiration is released during
a. Glycolysis
b. Pyruvate Dehydrogenase Complex
c. Citric Acid Cycle
d. Electron Transport Chain
29. What happens during the Citric Acid Cycle?
a. The cell releases energy through fermentation.
b. Each glucose molecule is broken down into two pyruvate molecules.
c. A proton gradient is created.
d. Pyruvate is broken down into carbon dioxide
30. When yeast ferments the sugar in bread dough, what is produced that causes
the bread dough to rise?
a. Ethanol
b. Oxygen
c. Water
d. Carbon Dioxide
31. What is the reduced molecule in the following reaction?
Pyruvate + NADH + H+  Lactate + NAD+
a. Lactate
b. Pyruvate
c. NADH
d. NAD+
32. The immediate energy source that drives ATP synthesis during oxidative
phosphorylation is
a. The flow of electrons down the electron transport chain
b. That attraction of electrons to Oxygen
c. The proton gradient created across the membrane
d. ATP from glycolysis
33. The final electron acceptor of the electron transport chain is
a. O2
b. CO2
c. H20
d. ADP
34. How many ATP molecules are produced per NADH?
a. 1
b. 2
c. 3
d. 10
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35. How many NADH molecules are produced during the breakdown of one
molecule of glucose?
a. 3
b. 2
c. 10
d. 12
36. The oxygen needed by cellular respiration is reduced and forms part of
which moleule?
a. Pyruvate
b. Water
c. Carbon Dioxide
d. Acetyl Co-A
37. ATP synthase relies on the facilitated diffusion of _____________ down their
concentration gradient to produce ATP.
a. Electrons
b. Protons
c. Glucose molecules
d. Oxygen molecules
38. ATP synthase is an example of an
a. Enzyme and Protein
b. Protein and Form of Energy
c. Enzyme and Form of Energy
d. Enzyme only
39. During which stage of aerobic respiration is oxygen necessary.
a. Glycolysis
b. Pyruvate Dehydrogenase Complex
c. Citric Acid Cycle
d. Electron Transport Chain and Oxidative Phosphorylation
40. Which of the following is the correct sequence of events in aerobic
respiration?
a. Citric Acid Cycle, Pyruvate Dehydrogenase Complex, Oxidative
Phosphorylation, Glycolysis
b. Glycolysis, Citric Acid Cycle, Pyruvate Dehydrogenase Complex,
Oxidative Phosphorylation
c. Glycolysis, Oxidative Phosphorylation, Citric Acid Cycle, Pyruvate
Dehydrogenase Complex
d. Glycolysis, Pyruvate Dehydrogenase Complex, Citric Acid Cycle,
Oxidative Phosphorylation
41. Glycolysis is thought to be one of the most ancient metabolic processes.
Which statement supports this idea?
a. Glycolysis neither uses nor needs oxygen.
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b. Glycolysis is used by all cells
c. Cells were performing glycolysis long before oxygen was present in
Earth’s atmosphere.
d. All of the above
42. Plants must have a continuous supply of __________________ for photosynthesis,
but they provide ______________ for cellular respiration.
a. Carbon Dioxide; Water
b. Carbon Dioxide; Oxygen
c. Water; Carbon Dioxide
d. Oxygen; Water
43. When the oxygen catastrophe occurred, which organisms died?
a. Aerobic
b. Anaerobic
c. Facultative bacteria
d. All organisms
44. During which process is the sun’s energy captured?
a. Citric Acid Cycle
b. Light Independent Reactions
c. Calvin Cycle
d. Light Dependent Reactions
45. Which chemical is necessary for the absorption of light during
photosynthesis?
a. NADPH
b. NADP+
c. Photosystem II
d. Chlorophyll
46. Which of the following is supplied to the Calvin Cycle by the light reactions of
photosynthesis
a. CO2 and ATP
b. ATP and NADPH
c. ATP and NADH
d. H2O and ATP
47. The oxygen given off by photosynthesis comes from
a. Glucose
b. Water
c. Carbon Dioxide
d. Pyruvate
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48. The function of the light reactions is to
a. Make glucose
b. Make a one carbon sugar
c. Produce water
d. Convert light energy into chemical energy
49. Which of the following cannot be made by plants using the glucose produced
from photosynthesis?
a. Nucleic Acids
b. Proteins
c. Starch
d. Cellulose
50. In what membrane bound structure do the light dependent reactions of
photosynthesis occur
a. Thylakoid
b. Nucleus
c. Cell
d. Chlorophyll
51. The stage of photosynthesis that uses the most ATP molecules is
a. The Calvin Cycle
b. The light dependent reactions
c. Glycolysis
d. The electron transport chain
52. The process by which carbon changes from carbon dioxide to glucose and
back is called
a. Glycolysis
b. The Carbon Cycle
c. The Calvin Cycle
d. The light dependent reactions
53. How many turns of the Calvin Cycle are needed to create one molecule of
glucose?
a. 1
b. 2
c. 3
d. 6
54. Which of the following is the reduced form of a molecule used only in
photosynthesis and not in cellular respiration?
a. NADH
b. FADH2
c. NAD+
d. NADPH
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55. Which of the following is not a result of increased carbon dioxide in the
atmosphere?
a. Increase in Earth’s temperature
b. Decrease in Earth’s temperature
c. Melting of icecaps
d. Dying crops
Multiple Choice Answers
1. a
2. c
3. b
4. d
5. a
6. b
7. b
8. a
9. b
10. b
11. c
12. c
13. d
14. a
15. c
16. C
17. A
18. D
19. D
20. A
21. C
22. B
23. C
24. D
25. B
26. D
27. A
28. C
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29. D
30. D
31. C
32. C
33. A
34. C
35. C
36. B
37. B
38. A
39. D
40. D
41. D
42. B
43. B
44. D
45. D
46. B
47. B
48. D
49. A
50. A
51. A
52. B
53. D
54. D
55. B
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