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Multiple Choice Review- Energy Processing
1. Metabolism is considered to be the “total chemical reactions occurring within
an organism”. These chemical reactions may be linked into “pathways”.
Which of the following statements best characterizes anabolic and catabolic
pathways?
a. Anabolic pathways break down molecules while catabolic pathways
synthesize molecules
b. Anabolic pathways synthesize molecules while catabolic pathways
break down molecules.
c. Both pathways synthesize molecules but do so in different ways.
d. Both pathways break down molecules but do so in different ways.
Two graphs are shown below. Use the graphs to answer questions 2 through 4.
http://adapaproject.org/bbk/tiki-index.php?page=Leaf%3A+What+is+a+catalyst%3F
2. Which of the following correctly describes the information shown in graph
#1?
a. This graph represents an endergonic reaction.
b. This graph represents a reaction with high activation energy.
c. This graph represents a catabolic pathway.
d. This graph represents an anabolic pathway.
3. The graphs above represent pathways that can be coupled or linked. In
which order would we link these pathways such that they can occur
spontaneously?
a. Reaction from graph 1 followed by the reaction from graph 2.
b. Reaction from graph 2 followed by the reaction from graph 1.
c. Reaction from graph 1 followed by another reaction from graph 1.
d. Reaction from graph 2 followed by another reaction from graph 2.
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4. Which of the reactions represented by the graphs above, will occur
spontaneously?
a. The reactions represented by graph 1.
b. The reactions represented by graph 2.
c. The reactions represented by both graph 1 and graph 2.
d. Not enough information to determine.
5. Cells use energy produced from reactions to power cell processes. How does
ATP function in this role?
a. Energy is stored within ADP and released when the terminal
phosphate is added.
b. Energy is stored within ATP and released when the terminal
phosphate bond is hydrolyzed.
c. Energy is stored as H+ and released when attached to ATP.
d. Energy is stored within ATP and released when a H+ is hydrolyzed.
6. Based upon the role of ATP within cells, what type of reactions are ATP
hydrolysis and ADP phosphorylation?
a. Both are endergonic reactions
b. Both are exergonic reactions
c. ATP hydrolysis is an endergonic reaction while ADP phosphorylation
is an exergonic reaction.
d. ATP hydrolysis is an exergonic reaction while ADP phosphorylation is
an endergonic reaction.
7. There are different types of cellular respiration. Cells can be classified based
on oxygen requirements of cellular respiration. Which of the following
statements correctly identifies the oxygen requirements for two of these cell
types?
a. Obligate aerobes can survive in the presence or absence of oxygen
while obligate anaerobes cannot survive in the presence of oxygen.
b. Facultative aerobes can survive in the presence or absence of oxygen
while obligate aerobes cannot survive in the presence of oxygen.
c. Facultative anaerobes can survive in the presence or absence of
oxygen while obligate anaerobes cannot survive in the presence of
oxygen.
d. Obligate anaerobes can survive in the presence or absence of oxygen
while obligate aerobes cannot survive in the presence of oxygen.
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The image below represents the steps of one of the processes of cellular
respiration. Use this illustration to respond to questions 8 and 9.
http://cnx.org/content/m45438/latest/?collection=col11487/latest
8. Identify the process shown in the image above.
a. photosystem 2
b. citric acid cycle
c. electron transport chain
d. glycolysis
9. How many net ATP are produced through the process shown in the image
above?
a. 2
b. 4
c. 6
d. 38
10. Pyruvate decarboxylation produces ATP as well as
a. NADH, acetyl Co-A and CO2
b. Citric acid, NADH and O2
c. Pyruvate, NADH and CO2
d. FADH, NADH and O2
11. By the end of the Citric acid (Krebs) cycle, one molecule of glucose has
produced ATP. However, the vast majority of the potential energy is stored
in the form of
a. ADP and FAD
b. CO2 and NADH
c. Pyruvate and NAD
d. NADH and FADH
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12. What is the role of ATP synthase in the electron transport chain?
a. ATP synthase removes the hydrogen from water and attaches it to
ADP to produce ATP.
b. Protons travel through ATP synthase, resulting in the addition of
phosphates to ADP molecules.
c. Protons travel through ATP synthase, resulting in the addition of
hydrogen to NAD and FAD molecules.
d. ATP synthase removes a phosphate group from ATP to produce ADP,
thereby releasing energy.
The illustration below represents a process that can be performed by certain
types of cells. Use this illustration to respond to questions 13 and 14.
Lactic acid
Alcohol
1
http://leavingbio.net/respiration-(higher%20level).htm
13. What is the process indicated by the number 1?
a. Citric acid (Krebs) cycle
b. Glycolysis
c. Fermentation
d. Electron transport chain
14. Under what conditions can the process, labeled 1 in the illustration above,
occur?
a. when oxygen is present
b. when oxygen is absent
c. when NAD is present
d. when carbon dioxide is absent
15. The energy from ATP used by cells originates from:
a. potential energy
b. light energy
c. dark energy
d. kinetic energy
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16. By approximately 2.0 BYA the process of photosynthesis had a catastrophic
affect upon the organisms that had evolved up to this time. Which of the
following best describes why?
a. Organisms up to this time had evolved in the absence of oxygen. The
process of photosynthesis caused an increase in oxygen and death for
many obligate aerobes.
b. Organisms up to this time had evolved in the presence of oxygen. The
process of photosynthesis caused a decrease in oxygen and death for
many obligate aerobes.
c. Organisms up to this time had evolved in the presence carbon dioxide.
The process of photosynthesis caused a decrease in carbon dioxide
and death for many obligate anaerobes.
d. Organisms up to this time had evolved in the absence of carbon
dioxide. The process of photosynthesis caused an increase in carbon
dioxide and death for many obligate aerobes.
17. The cyclic energy transport of photosynthesis was likely the first type of
photosynthesis to originate. Which of the following statements best
describes the result of cyclic energy transport?
a. Glucose and ADP are produced as the result of cyclic energy transport.
b. Glucose and ATP are produced as the result of cyclic energy transport.
c. Light energy is converted into ATP.
d. Light energy is converted into glucose.
18. Noncyclic energy transport consists of two major processes:
a. Cyclic energy transport and the calvin cycle.
b. One process that requires light and one process that must occur in the
absence of light.
c. One process that requires light and one process that can occur in the
presence or absence of light.
d. The lumen and stroma stages.
19. What is the order of the photosystems within the process of photosynthesis?
a. Photosystem II is followed by photosystem I.
b. Photosystem I is followed by photosystem II.
c. Photosystem II is followed by photosystems I and III.
d. The photosystems can function in any order as long as there is light.
20. Which of the following equations represents the reactants and products of
the Light Dependent Reactions of photosynthesis?
a. 2H2O + 2NADP- + 3ADP + 3P
O2 + 2NADPH + 3 ATP
b. O2 + 2NADPH + 3 ATP
2H2O + 2NADP- + 3ADP + 3P
c. light energy + 6H2O + 6CO2
C6H12O6 + 6O2
d. C6H12O6 + 6O2
6H2O + 6CO2
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The illustration below represents a process considered to be the first type of
photosynthesis to originate. Use this image to respond to questions 21 and 22.
http://www.majordifferences.com/2013/02/difference-between-cyclic-and-non.html
21. Which system is utilized to perform the process shown in the image above?
a. the mitochondria
b. the chloroplast
c. photosystem I
d. photosystem II
22. Why is the process seen in the image above, considered to be cyclic?
a. The process cycles between the lumen and the stroma.
b. The final electrons return to chlorophyll after ATP is generated.
c. The final electrons return too chlorophyll after ATP and glucose are
generated.
d. The process can cycle between light and dark reactions.
23. Which of the following statements best describes the overall structure of
both photosystems I and II?
a. Pigments and protein complexes found within mitochondrial
membranes.
b. Carbohydrate complexes found within mitochondrial membranes.
c. Pigments and carbohydrate complexes found within thylakoid
membranes.
d. Pigments and protein complexes found within thylakoid membranes.
24. Which of the following most contributed to the flooding of earth’s
atmosphere with oxygen?
a. light independent reactions
b. light dependent reactions
c. the krebs cycle
d. glycolysis
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25. Carbon fixing is best described as:
a. Carbon dioxide, as a gas in the atmosphere, is converted into free
carbon.
b. Carbon dioxide, as a gas in the atmosphere, is converted into glucose.
c. Oxygen is utilized to produce the carbon compound, glucose.
d. The carbon compound glucose is utilized to produce oxygen gas.
Use the image of the Calvin Cycle below to respond to question 26 and 27.
http://iws.collin.edu/biopage/faculty/mcculloch/1408/notes/photosynthesis/calvin%20cycle.htm
26. To make one glucose molecule, how many ATP, NADPH and CO2 molecules
are needed?
a. 3CO2, 9ATP and 6NADPH
b. 9CO2, 27ATP and 18NADPH
c. 6CO2, 18ATP and 12NADPH
d. CO2, 3ATP and 2NADPH
e.
27. Where does the process, show in the image above, occur within a cell?
a. embedded within the thylakoid membrane
b. in the lumen of the thylakoid
c. in the stroma of the chloroplast
d. in the mitochondria
28. In order to have the amount of ATP required to produce glucose, ATP must
be created. What is the source of the ATP required for this process?
a. cyclic energy transport
b. non-cyclic energy transport
c. Photosystem I
d. Calvin cycle
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NAD+ and FAD are key molecules involved the process of cell respiration.
Their chemical reactions are shown below. Use these equations to respond to
questions 29 through 31.
NAD+ + 2H+ +2e- + energy
NADH + H+
FAD + 2H+ +2e- + energy
FADH2
29. When the reaction proceeds to the right, energy is:
a. released
b. stored
c. destroyed
d. created
30. When the reaction proceeds to the left, and electrons are removed, this is
referred to as the process of:
a. oxidation
b. phosphorylation
c. electronization
d. reduction
31. One specific electron acceptor is most effective for the reactions shown
above. What is this acceptor and why is it the most effective?
a. Carbon dioxide because it produces the most energy as an electron
acceptor.
b. Nitrate because it produces the most FAD as an electron acceptor.
c. Oxygen because it produces the most energy as an electron acceptor.
d. Sulfate because it produces the most NADH as an electron acceptor.
32. The process known as glycolysis is a catabolic pathway. Which of the
following correctly lists the types of molecules that can be accepted into this
pathway?
a. Glucose only
b. carbohydrates, proteins and fats
c. nucleic acids, glucose and fats
d. proteins and glucose only
33. What role do enzymes play in the metabolism of a cell?
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a. They catalyze the steps of a pathway, allowing the pathway to proceed
more quickly.
b. They catalyze the steps of anabolic pathways allowing the release of
energy to power other reactions.
c. They catalyze catabolic pathways as energy is required for the
reactions to occur.
d. They catalyze the breakdown of molecules but not the synthesis of
molecules.
34. The reaction converting ATP to ADP can be coupled with a reaction to
synthesize a needed molecule. How does the coupling of these two reactions
cause the synthesis to proceed?
a. The reaction converting ATP to ADP requires energy. The reaction to
synthesize a molecule releases energy. Coupled together, one
promotes the other.
b. The reaction converting ATP to ADP releases energy. The reaction to
synthesize a molecule requires energy. Coupled together, one
promotes the other.
c. The reaction converting ATP to ADP both requires and releases
energy. The reaction to synthesize a molecule releases energy.
Coupled together, one promotes the other.
d. These reactions both require energy. This is why ATP is sometimes
used before it can be generated.
35. Cellular respiration consists of what four stages?
a. Calvin cycle, glycolysis, photosystem I and photosystem II
b. Photosystem 1 and photosystem II, krebs cycle and electron transport
chain
c. Fermentation, cyclic energy transfer, krebs cycle
d. Glycolysis, krebs cycle, electron transport chain
36. The production of lactic acid, such as in muscles after vigorous exercise, is an
example of which of the following processes?
a. fermentation
b. aerobic respiration
c. cyclic energy transfer
d. krebs cycle
37. What is the approximate percentage of ATP produced during the electron
transport chain (oxidative phosphorylation) compared to that produced by
all stages of aerobic respiration combined?
a. 5.5%
b. 11.1%
c. 89.5%
d. 99.9%
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38. If oxygen is present one NADH yields 3 ATPs and one FADH2 yields 2 ATPs.
What combination of NADH molecules and FADH2 molecules listed below,
will generate 40 ATP molecules?
a. 10 FADH2 and 5 NADH
b. 10 FADH2 and 10 NADH
c. 5 FADH2 and 10 NADH
d. 5 FADH2 and 5 NADH
39. Deforestation is one factor in the rise of carbon dioxide in our atmosphere.
Which of the following statements best describes why?
a. Removing plants from the surface of the earth decreases the amount
of oxygen produced allowing more room for carbon dioxide.
b. Removing plants from the surface of the earth decreases the amount
of carbon dioxide produced allowing for more cell respiration.
c. Removing plants from the surface of the earth means less uptake of
carbon trapped under the earth’s surface.
d. Removing plants from the surface of the earth decreases the amount
of carbon dioxide uptake allowing it to increase in the atmosphere.
40. Humans and other organisms are highly dependent upon plants for
sustaining life. Which of the following best describes why this statement is
correct?
a. Most organisms rely upon carbon dioxide and glucose, produced by
plants, for cell respiration. Cell respiration is required for metabolism
and therefore for life.
b. Most organisms rely upon the oxygen and proteins, produced by
plants, for cell respiration. Cell respiration is required for metabolism
and therefore for life.
c. Most organisms rely upon the oxygen and glucose, produced by
plants, for cell respiration. Cell respiration is required for metabolism
and therefore for life.
d. Most organisms rely upon the glucose, produced by plants, for
photosynthesis. Photosynthesis is required for metabolism and
therefore for life.
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Answer Key
Question #
Correct response
Question #
correct response
1
B
21
C
2
C
22
B
3
A
23
D
4
A
24
A
5
B
25
B
6
D
26
C
7
C
27
C
8
D
28
A
9
A
29
B
10
A
30
A
11
D
31
C
12
B
32
B
13
C
33
A
14
B
34
B
15
B
35
D
16
A
36
A
17
C
37
C
18
C
38
C
19
A
39
D
20
A
40
C
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