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Chapter 7
Standardized Test Prep
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Multiple Choice
Short Response
Extended Response
Chapter 7
Standardized Test Prep
Multiple Choice
1. Which of the following must pyruvic acid be
converted into before the Krebs cycle can proceed?
A. NADH
B. glucose
C. citric acid
D. acetyl CoA
Chapter 7
Standardized Test Prep
Multiple Choice, continued
1. Which of the following must pyruvic acid be
converted into before the Krebs cycle can proceed?
A. NADH
B. glucose
C. citric acid
D. acetyl CoA
Chapter 7
Standardized Test Prep
Multiple Choice, continued
2. Which of the following occurs in lactic acid
fermentation?
F. Oxygen is consumed.
G. Lactic acid is converted into pyruvic acid.
H. NAD+ is regenerated for use in glycolysis.
J. Electrons pass through the electron transport chain.
Chapter 7
Standardized Test Prep
Multiple Choice, continued
2. Which of the following occurs in lactic acid
fermentation?
F. Oxygen is consumed.
G. Lactic acid is converted into pyruvic acid.
H. NAD+ is regenerated for use in glycolysis.
J. Electrons pass through the electron transport chain.
Chapter 7
Standardized Test Prep
Multiple Choice, continued
3. Which of the following is not a product of the Krebs
cycle?
A. CO2
B. ATP
C. FADH2
D. ethyl alcohol
Chapter 7
Standardized Test Prep
Multiple Choice, continued
3. Which of the following is not a product of the Krebs
cycle?
A. CO2
B. ATP
C. FADH2
D. ethyl alcohol
Chapter 7
Standardized Test Prep
Multiple Choice, continued
4. In which way is cellular respiration similar to
photosynthesis?
F. They both make G3P.
G. They both involve ATP.
H. They both involve chemiosmosis.
J. all of the above
Chapter 7
Standardized Test Prep
Multiple Choice, continued
4. In which way is cellular respiration similar to
photosynthesis?
F. They both make G3P.
G. They both involve ATP.
H. They both involve chemiosmosis.
J. all of the above
Chapter 7
Standardized Test Prep
Multiple Choice, continued
5. ATP is synthesized in chemiosmosis when which of
the following moves across the inner mitochondrial
membrane?
A. NADH
B. oxygen
C. protons
D. citric acid
Chapter 7
Standardized Test Prep
Multiple Choice, continued
5. ATP is synthesized in chemiosmosis when which of
the following moves across the inner mitochondrial
membrane?
A. NADH
B. oxygen
C. protons
D. citric acid
Chapter 7
Standardized Test Prep
Multiple Choice, continued
The illustration shows
6. This reaction occurs during
part of a biochemical pathway.
which of the following
Use the illustration to
processes?
answer the question that follows.
F. Krebs cycle
G. acetyl CoA formation
H. alcoholic fermentation
J. lactic acid fermentation
Chapter 7
Standardized Test Prep
Multiple Choice, continued
The illustration shows
6. This reaction occurs during
part of a biochemical pathway.
which of the following
Use the illustration to
processes?
answer the question that follows.
F. Krebs cycle
G. acetyl CoA formation
H. alcoholic fermentation
J. lactic acid fermentation
Chapter 7
Standardized Test Prep
Multiple Choice, continued
7. glycolysis : pyruvic acid :: Krebs cycle :
A. O2
B. ATP
C. lactic acid
D. acetyl CoA
Chapter 7
Standardized Test Prep
Multiple Choice, continued
7. glycolysis : pyruvic acid :: Krebs cycle :
A. O2
B. ATP
C. lactic acid
D. acetyl CoA
Chapter 7
Standardized Test Prep
Multiple Choice, continued
The illustration below
8. At which of the points is
shows some stages and reactants
ATP, the main energy
of cellular respiration. Use the
currency of the cell,
illustration to answer the
produced?
question that follows.
F. 1 only
G. 2 only
H. 1 and 3
J. 1, 2, and 3
Chapter 7
Standardized Test Prep
Multiple Choice, continued
The illustration below
8. At which of the points is
shows some stages and reactants
ATP, the main energy
of cellular respiration. Use the
currency of the cell,
illustration to answer the
produced?
question that follows.
F. 1 only
G. 2 only
H. 1 and 3
J. 1, 2, and 3
Chapter 7
Standardized Test Prep
Short Response
The inner membrane of a mitochondrion is folded;
these folds are called cristae.
How might cellular respiration be different if the inner
mitochondrial membrane were not folded?
Chapter 7
Standardized Test Prep
Short Response, continued
The inner membrane of a mitochondrion is folded;
these folds are called cristae.
How might cellular respiration be different if the inner
mitochondrial membrane were not folded?
Answer:
The cristae increase the surface area of the inner
wall of the mitochondria, which allows more electron
transport chain pathways and ATP synthase. Thus,
the rate of cellular respiration is increased.
Chapter 7
Standardized Test Prep
Extended Response
Oxygen is produced during the reactions of
photosynthesis, and it is used in the reactions of
cellular respiration.
Part A How does oxygen get into or out of
chloroplasts and mitochondria?
Part B What are the roles of oxygen in the processes
of photosynthesis and cellular respiration, and
how are the roles similar?
Chapter 7
Standardized Test Prep
Extended Response, continued
Answer:
Part A Oxygen builds up inside chloroplasts as they produce
oxygen, forming a concentration gradient—high oxygen
concentration inside and low concentration outside. This causes
O2 to diffuse out of the chloroplast. In mitochondria, as O2 is
used up, a favorable gradient for the inward diffusion of oxygen
occurs.
Part B In photosynthesis, oxygen is formed when water is split
during the light reactions. This byproduct of photosynthesis is
released by cells and becomes available for aerobic respiration.
In aerobic respiration, oxygen is the final electron acceptor at
the end of electron transport. When oxygen accepts these
electrons (and protons), water is formed. Hence, water supplies
oxygen for photosynthesis, and oxygen is used to form water in
aerobic respiration.

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