Biology 121 Exam 3 Study Guide UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Where is ATP synthase located in the mitochondrion? - CORRECT ANSWER - Inner
Membrane
The direct energy source that drives ATP synthase during respiratory oxidative phosphorylation
is ... - CORRECT ANSWER - The difference in H+ concentrations on opposite sides of the
inner mitochondrial membrane
Energy released by the electron transport chain is used to pump H+ ions into which location? -
CORRECT ANSWER - Mitochondrial intermembrane space
The primary role of oxygen in cellular respiration is to - CORRECT ANSWER - act as an
acceptor for electrons and hydrogen, forming water
Where are the proteins of the electron transport chain located? - CORRECT ANSWER -
Mitochondrial inner membrane
Carbon dioxide (CO2) is released during which of the following stages of respiration? -
CORRECT ANSWER - Oxidation of pyruvate to acetyl CoA and the citric acid cycle
According to the Citric Acid Cycle how many molecules of carbon dioxide (CO2) would be
produced by five turns of the citric acid cycle? - CORRECT ANSWER - 10
Which of the following intermediary metabolites enters the citric acid cycle and is formed, in
part, by the removal of carbon (CO2) from one molecule of pyruvate? - CORRECT
ANSWER - Acetyl CoA
,In addition to ATP, what are the end products of glycolysis? - CORRECT ANSWER - NADH
and pyruvate
The oxygen consumed during cellular respiration is involved directly in which process or event?
- CORRECT ANSWER - Accepting electrons at the end of the electron transport chain
Where does glycolysis take place? - CORRECT ANSWER - Cytosol
Which of the following statements describes the results of this reaction? C6H12O6+6O2--
>6CO2+6H2O+Energy - CORRECT ANSWER - C6H12O6 is oxidized and O2 is reduced
Match each product of pyruvate metabolism (lactate, ethanol, acetyl CoA) with the condition
under which it is produced (Aerobic Oxidation, Fermentation in human muscle, fermentation in
yeast and bacteria) - CORRECT ANSWER - Lactate- fermentation in human muscle,
Ethanol- fermentation in yeast and bacteria, Acetyl CoA- Aerobic oxidation
Sort the following items (NAD+, lactate, NADH, pyruvate) according to whether they are
reactants or products in the anaerobic reduction of pyruvate during lactic acid fermentation. -
CORRECT ANSWER - Reactants= Pyruvate + NADH, Products= Lactate + NAD+
For each glucose that enter glycolysis, ___ acetyl CoA enter the citric acid cycle - CORRECT
ANSWER - 2
For each glucose that enters glycolysis, ___ NADH + H+ are produced by the citric acid cycle -
CORRECT ANSWER - 6
In cellular respiration, most ATP molecules are produced by ___. - CORRECT ANSWER -
Oxidative phosphorlyation
The final electron acceptor of cellular respiration is ___. - CORRECT ANSWER - Oxygen
, During electron transport, energy from ___ is used to pump hydrogen ions into the ___. -
CORRECT ANSWER - NADH and FADH2; intermembrane space
The proximate (immediate) source of energy for oxidative phosphorylation is___. - CORRECT
ANSWER - Kinetic energy that is released as hydrogen ions diffuse down their concentration
gradient
From the following compounds involved in cellular respiration (Pyruvate,Glucose, ADP,
NAD+,O2, Acetyl CoA, NADH, CO2, ATP, CoA, choose those that are the Net Inputs and Net
Outpouts of Glycolysis. - CORRECT ANSWER - Net Inputs- Glucose, NAD+, ADP Net
Outputs- ATP, Pyruvate, NADH Neither-CO2, Acetyl CoA, O2, CoA
From the following compounds involved in cellular respiration(Pyruvate, ADP, O2, NAD+,
CoA, Glucose, acetyl CoA, NADH, CO2, ATP), choose those that are net inputs and net outputs
of acetyl CoA formation. - CORRECT ANSWER - Net Inputs- Glucose, ADP, NAD+ Net
Outputs- Pyruvate, ATP, NAD Neither- CO2, Acetyl CoA, O2, coenzyme A
From the following compounds involved in cellular respiration (pyruvate, CO2, ADP, Glucose,
NAD+, Acetyl CoA, NADH,ATP, O2, coenzyme A) , choose those that are the net inputs and
net outputs of the citric acid cycle. - CORRECT ANSWER - Net Inputs- NAD+, ADP, Acetyl
CoA Net Outputs- CO2, CoA, NADH, ATP Neither- Glucose, O2, Pyruvate
From the following compounds involved in cellular respiration (ADP, acetyl CoA, pyruvate,
NAD+, ATP, CO2, NADH, coenzyme A, O2, glucose), choose those that are the net inputs and
net outputs of oxidative phosphorylation. - CORRECT ANSWER - Net Inputs- ADP, NADH,
O2 Net Outputs- ATP, H2O, NAD+ Neither- CO2, acetyl CoA, Glucose, Pyruvate, CoA
Acetyl CoA formation occurs where in the cell? - CORRECT ANSWER - Mitochondrial
matrix
Citric Acid Cycle occurs where in the cell? - CORRECT ANSWER - Mitochondrial matrix
ACTUAL Exam Questions and CORRECT
Answers
Where is ATP synthase located in the mitochondrion? - CORRECT ANSWER - Inner
Membrane
The direct energy source that drives ATP synthase during respiratory oxidative phosphorylation
is ... - CORRECT ANSWER - The difference in H+ concentrations on opposite sides of the
inner mitochondrial membrane
Energy released by the electron transport chain is used to pump H+ ions into which location? -
CORRECT ANSWER - Mitochondrial intermembrane space
The primary role of oxygen in cellular respiration is to - CORRECT ANSWER - act as an
acceptor for electrons and hydrogen, forming water
Where are the proteins of the electron transport chain located? - CORRECT ANSWER -
Mitochondrial inner membrane
Carbon dioxide (CO2) is released during which of the following stages of respiration? -
CORRECT ANSWER - Oxidation of pyruvate to acetyl CoA and the citric acid cycle
According to the Citric Acid Cycle how many molecules of carbon dioxide (CO2) would be
produced by five turns of the citric acid cycle? - CORRECT ANSWER - 10
Which of the following intermediary metabolites enters the citric acid cycle and is formed, in
part, by the removal of carbon (CO2) from one molecule of pyruvate? - CORRECT
ANSWER - Acetyl CoA
,In addition to ATP, what are the end products of glycolysis? - CORRECT ANSWER - NADH
and pyruvate
The oxygen consumed during cellular respiration is involved directly in which process or event?
- CORRECT ANSWER - Accepting electrons at the end of the electron transport chain
Where does glycolysis take place? - CORRECT ANSWER - Cytosol
Which of the following statements describes the results of this reaction? C6H12O6+6O2--
>6CO2+6H2O+Energy - CORRECT ANSWER - C6H12O6 is oxidized and O2 is reduced
Match each product of pyruvate metabolism (lactate, ethanol, acetyl CoA) with the condition
under which it is produced (Aerobic Oxidation, Fermentation in human muscle, fermentation in
yeast and bacteria) - CORRECT ANSWER - Lactate- fermentation in human muscle,
Ethanol- fermentation in yeast and bacteria, Acetyl CoA- Aerobic oxidation
Sort the following items (NAD+, lactate, NADH, pyruvate) according to whether they are
reactants or products in the anaerobic reduction of pyruvate during lactic acid fermentation. -
CORRECT ANSWER - Reactants= Pyruvate + NADH, Products= Lactate + NAD+
For each glucose that enter glycolysis, ___ acetyl CoA enter the citric acid cycle - CORRECT
ANSWER - 2
For each glucose that enters glycolysis, ___ NADH + H+ are produced by the citric acid cycle -
CORRECT ANSWER - 6
In cellular respiration, most ATP molecules are produced by ___. - CORRECT ANSWER -
Oxidative phosphorlyation
The final electron acceptor of cellular respiration is ___. - CORRECT ANSWER - Oxygen
, During electron transport, energy from ___ is used to pump hydrogen ions into the ___. -
CORRECT ANSWER - NADH and FADH2; intermembrane space
The proximate (immediate) source of energy for oxidative phosphorylation is___. - CORRECT
ANSWER - Kinetic energy that is released as hydrogen ions diffuse down their concentration
gradient
From the following compounds involved in cellular respiration (Pyruvate,Glucose, ADP,
NAD+,O2, Acetyl CoA, NADH, CO2, ATP, CoA, choose those that are the Net Inputs and Net
Outpouts of Glycolysis. - CORRECT ANSWER - Net Inputs- Glucose, NAD+, ADP Net
Outputs- ATP, Pyruvate, NADH Neither-CO2, Acetyl CoA, O2, CoA
From the following compounds involved in cellular respiration(Pyruvate, ADP, O2, NAD+,
CoA, Glucose, acetyl CoA, NADH, CO2, ATP), choose those that are net inputs and net outputs
of acetyl CoA formation. - CORRECT ANSWER - Net Inputs- Glucose, ADP, NAD+ Net
Outputs- Pyruvate, ATP, NAD Neither- CO2, Acetyl CoA, O2, coenzyme A
From the following compounds involved in cellular respiration (pyruvate, CO2, ADP, Glucose,
NAD+, Acetyl CoA, NADH,ATP, O2, coenzyme A) , choose those that are the net inputs and
net outputs of the citric acid cycle. - CORRECT ANSWER - Net Inputs- NAD+, ADP, Acetyl
CoA Net Outputs- CO2, CoA, NADH, ATP Neither- Glucose, O2, Pyruvate
From the following compounds involved in cellular respiration (ADP, acetyl CoA, pyruvate,
NAD+, ATP, CO2, NADH, coenzyme A, O2, glucose), choose those that are the net inputs and
net outputs of oxidative phosphorylation. - CORRECT ANSWER - Net Inputs- ADP, NADH,
O2 Net Outputs- ATP, H2O, NAD+ Neither- CO2, acetyl CoA, Glucose, Pyruvate, CoA
Acetyl CoA formation occurs where in the cell? - CORRECT ANSWER - Mitochondrial
matrix
Citric Acid Cycle occurs where in the cell? - CORRECT ANSWER - Mitochondrial matrix
