Cellular Bioenergetics & Membrane Exam 4: Electron Transport Chain Complexes
I-IV, FADH2 & NADH Oxidation, Coenzyme Q & Cytochrome Electron Transfer,
Proton Gradient & Chemiosmotic Coupling, ATP Synthase F0/F1 Conformational
Changes, Oxidative Phosphorylation, Uncouplers, Glycerol Phosphate Shuttle,
Redox Potentials, Aerobic Respiration Net ATP Yield, Fatty Acid β-Oxidation,
Carnitine Shuttle, Saturated vs Unsaturated Fatty Acids, Cis/Trans Double Bonds,
Melting Point, Triacylglycerols & Phosphoacylglycerols, Sphingolipids &
Glycolipids, Membrane Fluidity & Cholesterol Modulation, Membrane
Asymmetry, Sodium-Potassium Pump, Active vs Passive Transport, Lipase &
Ester Hydrolysis, Ketone Body Formation & Blood pH, Vitamin E Antioxidant
Function, Reactive Oxygen Species Defense, Prostoglandin & Arachidonic Acid
Pathways, Vitamin D & K Roles, Myelin Sheath Composition, Membrane Protein
Localization, Amphipathic Molecules, Simple vs Facilitated Diffusion,
Transmembrane Transport Energetics Exam Questions Verified and Provided
with Complete A+ Graded Rationales Latest Updated 2026
Complex II of the electron transport chain oxidizes ____, reduces ____, and ____ protons in the
process.
FADH2; coenzyme Q; pumps
NADH; coenzyme Q; doesn't pump
NADH; coenzyme Q; pumps
FADH2; coenzyme Q; doesn't pump
,FADH2; coenzyme Q; doesn't pump
The ultimate electron acceptor in the electron transport chain is
none of these
NAD+.
FAD.
ADP.
oxygen.
oxygen
Most of the reactions of electron transport in the mitochondria occur
in the intermembrane space.
in the cytosol.
on the inner membrane.
on the outer membrane
in the mitochondrial matrix.
on the inner membrane.
Which of the following terms describes ATP synthesis in mitochondria?
oxidative phosphorylation
,none of these
substrate-level phosphorylation
photophosphorylation
oxidative phosphorylation
What can be used to predict the sequence of electron carriers in the electron transport chain?
Standard reduction potentials
The concentrations of the components of the electron transport chain
Uncouplers
pH values in the matrix
Standard reduction potentials
To calculate the ΔG of a redox reaction, you need:
Answers:
the Faraday constant
all of these
the number of electrons involved in the transfer
none of these
the reduction potential (E°) of the half reactions
all of these
, Reduction potentials (E °) are measured by reading a voltmeter, which measures the electron
flow between two reaction chambers.
Answers:
True
False
True
The reference reaction for determining reduction potentials (E ° = 0) is the reduction of
Selected Answer:
NAD+ to NADH.
none of these
H+ to H2 gas
oxygen (O2) to water.
FAD to FADH2.
H+ to H2 gas
When mitochondria are actively carrying out aerobic respiration (that is, electron transport is
happening)
-the pH of the matrix is greater than the pH of the intermembrane space.
- the pH of the matrix is about the same as the pH of the intermembrane space.
- the pH of the matrix is less than the pH of the intermembrane space.
I-IV, FADH2 & NADH Oxidation, Coenzyme Q & Cytochrome Electron Transfer,
Proton Gradient & Chemiosmotic Coupling, ATP Synthase F0/F1 Conformational
Changes, Oxidative Phosphorylation, Uncouplers, Glycerol Phosphate Shuttle,
Redox Potentials, Aerobic Respiration Net ATP Yield, Fatty Acid β-Oxidation,
Carnitine Shuttle, Saturated vs Unsaturated Fatty Acids, Cis/Trans Double Bonds,
Melting Point, Triacylglycerols & Phosphoacylglycerols, Sphingolipids &
Glycolipids, Membrane Fluidity & Cholesterol Modulation, Membrane
Asymmetry, Sodium-Potassium Pump, Active vs Passive Transport, Lipase &
Ester Hydrolysis, Ketone Body Formation & Blood pH, Vitamin E Antioxidant
Function, Reactive Oxygen Species Defense, Prostoglandin & Arachidonic Acid
Pathways, Vitamin D & K Roles, Myelin Sheath Composition, Membrane Protein
Localization, Amphipathic Molecules, Simple vs Facilitated Diffusion,
Transmembrane Transport Energetics Exam Questions Verified and Provided
with Complete A+ Graded Rationales Latest Updated 2026
Complex II of the electron transport chain oxidizes ____, reduces ____, and ____ protons in the
process.
FADH2; coenzyme Q; pumps
NADH; coenzyme Q; doesn't pump
NADH; coenzyme Q; pumps
FADH2; coenzyme Q; doesn't pump
,FADH2; coenzyme Q; doesn't pump
The ultimate electron acceptor in the electron transport chain is
none of these
NAD+.
FAD.
ADP.
oxygen.
oxygen
Most of the reactions of electron transport in the mitochondria occur
in the intermembrane space.
in the cytosol.
on the inner membrane.
on the outer membrane
in the mitochondrial matrix.
on the inner membrane.
Which of the following terms describes ATP synthesis in mitochondria?
oxidative phosphorylation
,none of these
substrate-level phosphorylation
photophosphorylation
oxidative phosphorylation
What can be used to predict the sequence of electron carriers in the electron transport chain?
Standard reduction potentials
The concentrations of the components of the electron transport chain
Uncouplers
pH values in the matrix
Standard reduction potentials
To calculate the ΔG of a redox reaction, you need:
Answers:
the Faraday constant
all of these
the number of electrons involved in the transfer
none of these
the reduction potential (E°) of the half reactions
all of these
, Reduction potentials (E °) are measured by reading a voltmeter, which measures the electron
flow between two reaction chambers.
Answers:
True
False
True
The reference reaction for determining reduction potentials (E ° = 0) is the reduction of
Selected Answer:
NAD+ to NADH.
none of these
H+ to H2 gas
oxygen (O2) to water.
FAD to FADH2.
H+ to H2 gas
When mitochondria are actively carrying out aerobic respiration (that is, electron transport is
happening)
-the pH of the matrix is greater than the pH of the intermembrane space.
- the pH of the matrix is about the same as the pH of the intermembrane space.
- the pH of the matrix is less than the pH of the intermembrane space.
