1. Preview Chapter 7 Multiple Choice Short Response Extended Response
Standardized Test Prep
Preview
Multiple Choice
Short Response
Extended Response

2. Chapter 7 Multiple Choice
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

3. Multiple Choice, continued
Chapter 7
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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

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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.

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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.

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3. Which of the following is not a product of the Krebs cycle?
A. CO2
B. ATP
C. FADH2
D. ethyl alcohol

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3. Which of the following is not a product of the Krebs cycle?
A. CO2
B. ATP
C. FADH2
D. ethyl alcohol

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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

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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

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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

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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

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The illustration shows
part of a biochemical pathway. Use the illustration to
answer the question that follows.
6. This reaction occurs during which of the following processes?
F. Krebs cycle
G. acetyl CoA formation
H. alcoholic fermentation
J. lactic acid fermentation

13. Multiple Choice, continued
Chapter 7
Standardized Test Prep
Multiple Choice, continued
The illustration shows
part of a biochemical pathway. Use the illustration to
answer the question that follows.
6. This reaction occurs during which of the following processes?
F. Krebs cycle
G. acetyl CoA formation
H. alcoholic fermentation
J. lactic acid fermentation

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7. glycolysis : pyruvic acid :: Krebs cycle :
A. O2
B. ATP
C. lactic acid
D. acetyl CoA

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7. glycolysis : pyruvic acid :: Krebs cycle :
A. O2
B. ATP
C. lactic acid
D. acetyl CoA

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The illustration below
shows some stages and reactants of cellular respiration. Use the illustration to answer the question that follows.
8. At which of the points is ATP, the main energy currency of the cell, produced?
F. 1 only
G. 2 only
H. 1 and 3
J. 1, 2, and 3

17. Multiple Choice, continued
Chapter 7
Standardized Test Prep
Multiple Choice, continued
The illustration below
shows some stages and reactants of cellular respiration. Use the illustration to answer the question that follows.
8. At which of the points is ATP, the main energy currency of the cell, produced?
F. 1 only
G. 2 only
H. 1 and 3
J. 1, 2, and 3

18. Chapter 7 Short Response
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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?

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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.

20. Chapter 7 Extended Response
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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?

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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.