Download AP Bio Chapter 9: Cellular Respiration 1. What is the term for

AP Bio Chapter 9: Cellular Respiration
1. What is the term for metabolic pathways that release stored energy by breaking down
complex molecules?
a. anabolic pathways
b. catabolic pathways
c. fermentation pathways
d. thermodynamic pathways
e. bioenergetic pathways
2. The molecule that functions as the reducing agent (electron donor) in a redox or
oxidation-reduction reaction
a. gains electrons and gains energy.
b. loses electrons and loses energy.
c. gains electrons and loses energy.
d. loses electrons and gains energy.
e. neither gains nor loses electrons, but gains or loses energy.
3. Why does the oxidation of organic compounds by molecular oxygen to produce
water release free energy?
a. The covalent bonds in organic molecules are higher energy bonds than
those in water and carbon dioxide.
b. Electrons are being moved from atoms that have a lower affinity for
electrons (such as C) to atoms with a higher affinity for electrons
(such as O).
c. The oxidation of organic compounds can be used to make ATP.
d. The electrons have a higher potential energy when associated with
water and
than they do in organic compounds.
e. The covalent bond in
is unstable and easily broken by electrons
from organic molecules.
4. Which of the following statements describes the results of this reaction?
a.
b.
c.
d.
is oxidized and
is oxidized and
is reduced and
is reduced.
is reduced.
is oxidized.
is reduced and
is oxidized.
and
e.
is reduced and
is oxidized.
5. When a molecule of NAD (nicotinamide adenine dinucleotide) gains a hydrogen atom
(not a hydrogen ion) the molecule becomes
a. hydrogenated.
b. oxidized.
c. reduced.
d. redoxed.
e. a reducing agent.
6. The ATP made during glycolysis is generated by
a. substrate-level phosphorylation.
b. electron transport.
c. photophosphorylation.
d. chemiosmosis.
e. oxidation of NADH to NAD .
7. The oxygen consumed during cellular respiration is involved directly in which process or
event?
a. glycolysis
b. accepting electrons at the end of the electron transport chain
c. the citric acid cycle
d. the oxidation of pyruvate to acetyl CoA
e. the phosphorylation of ADP to form ATP
8. Which process in eukaryotic cells will proceed normally whether oxygen (O2) is present
or absent?
a. electron transport
b. glycolysis
c. the citric acid cycle
d. oxidative phosphorylation
e. chemiosmosis
9. Why are carbohydrates and fats considered high energy foods?
a. They have a lot of oxygen atoms.
b. They have no nitrogen in their makeup.
c. They can have very long carbon skeletons.
d. They have a lot of electrons associated with hydrogen.
e. They are easily reduced.
10. During glycolysis, when glucose is catabolized to pyruvate, most of the energy of glucose
is
a. transferred to ADP, forming ATP.
b. transferred directly to ATP.
c. retained in the pyruvate.
d. stored in the NADH produced.
e. used to phosphorylate fructose to form fructose-6-phosphate.
11. In addition to ATP, what are the end products of glycolysis?
a.
and
b.
and pyruvate
c. NADH and pyruvate
d.
and NADH
e.
,
, and citrate
12. Starting with one molecule of glucose, the "net" products of glycolysis are
a. 2 NAD , 2 H , 2 pyruvate, 2 ATP, and 2
.
b. 2 NADH, 2 H , 2 pyruvate, 2 ATP, and 2
c. 2
, 2 pyruvate, 4 ATP, and 2
d. 6
,6
, 2 ATP, and 2 pyruvate.
e. 6
,6
, 36 ATP, and 2 citrate.
.
.
13. In glycolysis, for each molecule of glucose oxidized to pyruvate
a. 2 molecules of ATP are used and 2 molecules of ATP are produced.
b. 2 molecules of ATP are used and 4 molecules of ATP are produced.
c. 4 molecules of ATP are used and 2 molecules of ATP are produced.
d. 2 molecules of ATP are used and 6 molecules of ATP are produced.
e. 6 molecules of ATP are used and 6 molecules of ATP are produced.
14. A molecule that is phosphorylated
a. has been reduced as a result of a redox reaction involving the loss of
an inorganic phosphate.
b. has a decreased chemical reactivity; it is less likely to provide energy
for cellular work.
c. has been oxidized as a result of a redox reaction involving the gain of
an inorganic phosphate.
d. has an increased chemical reactivity; it is primed to do cellular work.
e. has less energy than before its phosphorylation and therefore less
energy for cellular work.
15. Why is glycolysis described as having an investment phase and a payoff phase?
a. It both splits molecules and assembles molecules.
b. It attaches and detaches phosphate groups.
c. It uses glucose and generates pyruvate.
d. It shifts molecules from cytosol to mitochondrion.
e. It uses stored ATP and then forms a net increase in ATP.
16. How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of
one molecule of pyruvate?
a. 2
b. 4
c. 6
d. 8
e. 10
Refer to Figure 9.2, showing the citric acid cycle, as a guide to answer the following
questions.
Figure 9.2
17. Starting with one molecule of isocitrate and ending with fumarate, what is the maximum
number of ATP molecules that could be made through substrate-level phosphorylation?
a.
b.
c.
d.
e.
1
2
11
12
24
18. How many molecules of carbon dioxide (
) would be produced by five turns of the
citric acid cycle?
a. 2
b. 5
c. 10
d. 12
e. 60
19. Carbon dioxide (
) is released during which of the following stages of cellular
respiration?
a. glycolysis and the oxidation of pyruvate to acetyl CoA
b. oxidation of pyruvate to acetyl CoA and the citric acid cycle
c. the citric acid cycle and oxidative phosphorylation
d. oxidative phosphorylation and fermentation
e. fermentation and glycolysis
20. For each molecule of glucose that is metabolized by glycolysis and the citric acid cycle,
what is the total number of NADH +
molecules produced?
a.
b.
c.
d.
e.
4
5
6
10
12
21. Cellular respiration harvests the most chemical energy from which of the following?
a. substrate-level phosphorylation
b. chemiosmotic phosphorylation
c. converting oxygen to ATP
d. transferring electrons from organic molecules to pyruvate
e. generating carbon dioxide and oxygen in the electron transport chain
22. Where are the proteins of the electron transport chain located?
a. cytosol
b.
c.
d.
e.
mitochondrial outer membrane
mitochondrial inner membrane
mitochondrial intermembrane space
mitochondrial matrix
23. The primary role of oxygen in cellular respiration is to
a. yield energy in the form of ATP as it is passed down the respiratory
chain.
b. act as an acceptor for electrons and hydrogen, forming water.
c. combine with carbon, forming
.
d. combine with lactate, forming pyruvate.
e. catalyze the reactions of glycolysis.
24. During oxidative phosphorylation,
is formed. Where does the oxygen for the
synthesis of the water come from?
a. carbon dioxide (
)
b. glucose (
)
c. molecular oxygen (
d. pyruvate (
e. lactate (
)
-)
-)
25. The direct energy source that drives ATP synthesis during respiratory oxidative
phosphorylation is
a. oxidation of glucose to
and water.
b. the thermodynamically favorable flow of electrons from NADH to the
mitochondrial electron transport carriers.
c. the final transfer of electrons to oxygen.
d. the difference in H concentrations on opposite sides of the inner
mitochondrial membrane.
e. the thermodynamically favorable transfer of phosphate from glycolysis
and the citric acid cycle intermediate molecules of ADP.
26. Where is ATP synthase located in the mitochondrion?
a. cytosol
b. electron transport chain
c. outer membrane
d. inner membrane
e. mitochondrial matrix
27. Which of the following produces the most ATP when glucose (
oxidized to carbon dioxide (
a.
b.
c.
d.
e.
) is completely
) and water?
glycolysis
fermentation
oxidation of pyruvate to acetyl CoA
citric acid cycle
oxidative phosphorylation (chemiosmosis)
28. Approximately how many molecules of ATP are produced from the complete oxidation of
two molecules of glucose (
) in cellular respiration?
a.
b.
c.
d.
e.
2
4
15
38
76
29. Approximately what percentage of the energy of glucose (
storage in ATP as a result of the complete oxidation of glucose to
cellular respiration?
a. 2%
b. 4%
c. 10%
d. 25%
e. 40%
30. What is proton-motive force?
a. the force required to remove an electron from hydrogen
b. the transmembrane proton concentration gradient
c. movement of hydrogen into the intermembrane space
d. movement of hydrogen into the mitochondrion
e. the addition of hydrogen to NAD
31. Which of the following couples chemiosmosis to energy storage?
a. NADH
b.
c. cytochromes
d. electron transport
e. ATP synthase
) is transferred to
and water in
32. Which of the following occurs in the cytosol of a eukaryotic cell?
a. glycolysis and fermentation
b. fermentation and chemiosmosis
c. oxidation of pyruvate to acetyl CoA
d. citric acid cycle
e. oxidative phosphorylation
33. Which metabolic pathway is common to both cellular respiration and fermentation?
a. the oxidation of pyruvate to acetyl CoA
b. the citric acid cycle
c. oxidative phosphorylation
d. glycolysis
e. chemiosmosis
34. In the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the
production of
a. ATP,
, and ethanol (ethyl alcohol).
b. ATP,
, and lactate.
c. ATP, NADH, and pyruvate.
d. ATP, pyruvate, and oxygen.
e. ATP, pyruvate, and acetyl CoA.
35. Glycolysis is thought to be one of the most ancient of metabolic processes. Which
statement supports this idea?
a. Glycolysis is the most widespread metabolic pathway.
b. Glycolysis neither uses nor needs O2.
c. Glycolysis is found in all eukaryotic cells.
d. The enzymes of glycolysis are found in the cytosol rather than in a
membrane-enclosed organelle.
e. Ancient prokaryotic cells, the most primitive of cells, made extensive
use of glycolysis long before oxygen was present in Earth's
atmosphere.
36. Muscle cells, when an individual is exercising heavily and when the muscle becomes
oxygen deprived, convert pyruvate to lactate. What happens to the lactate in skeletal
muscle cells?
a. It is converted to NAD .
b. It produces
and water.
c. It is taken to the liver and converted back to pyruvate.
d. It reduces
to FAD .
e. It is converted to alcohol.
AP Bio Chapter 9: Cellular Respiration
Answer Section
MULTIPLE CHOICE
1. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.1
2. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.1
3. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.1
4. ANS: A
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.1
5. ANS: C
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.1
6. ANS: A
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.1
7. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.1
8. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.1
9. ANS: D
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.1
10. ANS: C
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.2
11. ANS: C
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.2
12. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.2
13. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.2
14. ANS: D
PTS: 1
MSC: Synthesis/Evaluation
TOP: Concept 9.2
15. ANS: E
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.2
16. ANS: A
TOP: Concept 9.3
PTS: 1
MSC: Knowledge/Comprehension
17. ANS: A
PTS: 1
MSC: Application/Analysis
TOP: Concept 9.3
18. ANS: C
PTS: 1
MSC: Application/Analysis
TOP: Concept 9.3
19. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.3
20. ANS: E
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.3
21. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.3
22. ANS: C
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
23. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
24. ANS: C
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
25. ANS: D
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
26. ANS: D
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
27. ANS: E
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
28. ANS: E
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
29. ANS: E
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
30. ANS: B
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
31. ANS: E
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.4
32. ANS: A
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.5
33. ANS:
MSC:
34. ANS:
MSC:
TOP: Concept 9.5
D
PTS: 1
Knowledge/Comprehension
A
PTS: 1
Knowledge/Comprehension
TOP: Concept 9.5
35. ANS: A
PTS: 1
MSC: Synthesis/Evaluation
TOP: Concept 9.5
36. ANS: C
PTS: 1
MSC: Knowledge/Comprehension
TOP: Concept 9.5