BIO 121 Exam #3
1. The reaction for cellular respiration is:
a. 6O2 + C3H6O3→6CO2 + 6H2O
b. 6CO2 +6H2O→C3H6O3 + 6O2
c. 6O2 + C6H12O6→6CO2 + 6H2O
d. 6CO2 + 6H2O→ C6H12O6+ 6O2
2. Which of the following would represent a reduced molecule (the product of a
reduction reaction)?
a. NAD+
b. NADH
c. both
3. When a molecule has been oxidized, it has experienced a loss in potential/stored energy.
a. True
b. False
4. Which of the three stages of aerobic cellular respiration is the only one to take place
in the cytoplasm (and also the only one that can take place in humans in the absence
of oxygen)?
a. glycolysis
b. the citric acid (Krebs) cycle
c. the electron transport chain/system
5. Which of the following would be a product of glycolysis?
a. pyruvate molecules
b. a small amount of ATP
c. a small amount of NADH
d. all of the above
, 6. Which of the three stages of aerobic cellular respiration generates carbon
dioxide molecules as a product?
a. glycolysis
b. the citric acid (Krebs) cycle
c. the electron transport chain/system
7. Which of the following is the molecule that “cranks” the Krebs (citric acid) cycle
(picking up 2-carbon acetyl-CoA molecules at the beginning of the cycle and
being reformed at the end of the cycle)?
a. ATP synthase
b. pyruvate
c. Coenzyme A
d. oxaloacetate
8. Where does the Krebs (citric acid) cycle step of cellular respiration occur?
a. the cytoplasm
b. the mitochondrial matrix (center of a mitochondrion/mitochondria)
c. along the inner mitochondrial membrane
d. It varies.
9. During the electron transport chain/system, is directly required (as a reactant
and final electron acceptor), and is generated (as a product).
a. O2, CO2
b. H2O, CO2
c. O2, H2O
d. H2O, O2
10. Which of the following will serve as an electron “donor,” contributing electrons to
the electron transport chain/system of aerobic cellular respiration?
a. ATP
b. NADH
c. O2
d. H2O
e. all of the above
11. In the electron transport chain of cellular respiration, ATP is produced as
hydrogen protons rush down their concentration gradient through NADH synthase
channels.
a. True
b. False
1. The reaction for cellular respiration is:
a. 6O2 + C3H6O3→6CO2 + 6H2O
b. 6CO2 +6H2O→C3H6O3 + 6O2
c. 6O2 + C6H12O6→6CO2 + 6H2O
d. 6CO2 + 6H2O→ C6H12O6+ 6O2
2. Which of the following would represent a reduced molecule (the product of a
reduction reaction)?
a. NAD+
b. NADH
c. both
3. When a molecule has been oxidized, it has experienced a loss in potential/stored energy.
a. True
b. False
4. Which of the three stages of aerobic cellular respiration is the only one to take place
in the cytoplasm (and also the only one that can take place in humans in the absence
of oxygen)?
a. glycolysis
b. the citric acid (Krebs) cycle
c. the electron transport chain/system
5. Which of the following would be a product of glycolysis?
a. pyruvate molecules
b. a small amount of ATP
c. a small amount of NADH
d. all of the above
, 6. Which of the three stages of aerobic cellular respiration generates carbon
dioxide molecules as a product?
a. glycolysis
b. the citric acid (Krebs) cycle
c. the electron transport chain/system
7. Which of the following is the molecule that “cranks” the Krebs (citric acid) cycle
(picking up 2-carbon acetyl-CoA molecules at the beginning of the cycle and
being reformed at the end of the cycle)?
a. ATP synthase
b. pyruvate
c. Coenzyme A
d. oxaloacetate
8. Where does the Krebs (citric acid) cycle step of cellular respiration occur?
a. the cytoplasm
b. the mitochondrial matrix (center of a mitochondrion/mitochondria)
c. along the inner mitochondrial membrane
d. It varies.
9. During the electron transport chain/system, is directly required (as a reactant
and final electron acceptor), and is generated (as a product).
a. O2, CO2
b. H2O, CO2
c. O2, H2O
d. H2O, O2
10. Which of the following will serve as an electron “donor,” contributing electrons to
the electron transport chain/system of aerobic cellular respiration?
a. ATP
b. NADH
c. O2
d. H2O
e. all of the above
11. In the electron transport chain of cellular respiration, ATP is produced as
hydrogen protons rush down their concentration gradient through NADH synthase
channels.
a. True
b. False
