OXIDATIVE PHOSPHORYLATION ASSESSMENT QUESTIONS WITH
CORRECT RESPONSES AND RATIONALE FOR ACADEMIC USE (NEWEST)
The answer is Oxidative Phosphorylation. The process by which a number of
electron carriers move electrons from NADH and FADH₂ to O₂ in order to
create ATP.
Proton-motive force: ANSWER The pumping of protons is caused by the
transport of electrons. occurs across the inner membrane of the mitochondria,
where ATP is synthesized.
ANSWER Voltage-dependent anion channel, or VDAC
The proton motive force consists of two parts. ANSWER 1. Potential of the
membrane
2. gradient of protons
Potential for phosphoryl transfer: ANSWER ΔG°' (prime indicates at pH 7)
The electron transfer potential of NADH/FADH₂ is changed into the phosphoryl
transfer potential of ATP during oxidative phosphorylation.
ANSWER Convention: Oxidant + e⁻ -> reductant
Relationship between the change in reduction potential and the standard free
energy change ANSWER ΔG°' = -nF where n is the number of electrons and
ΔE'₀
F is equal to 23.06 kcal mol⁻¹ V⁻, the Faraday constant.
Change in reduction potential (volts) equals ΔE'₀.
Standard free energy change (kcal mol⁻¹) is equal to ΔG°'.
Lactate = reductant; pyruvate = oxidant - ANSWER
When oxygen is reduced to water, how much energy is released? ANSWER
Guidance Electrons migrate from -ve to +ve, from compounds with lower e⁻
affinity to those with higher e⁻ affinity, and from high energy to low energy.
Protons are pumped across the inner mitochondrial membrane using the energy.
CORRECT RESPONSES AND RATIONALE FOR ACADEMIC USE (NEWEST)
The answer is Oxidative Phosphorylation. The process by which a number of
electron carriers move electrons from NADH and FADH₂ to O₂ in order to
create ATP.
Proton-motive force: ANSWER The pumping of protons is caused by the
transport of electrons. occurs across the inner membrane of the mitochondria,
where ATP is synthesized.
ANSWER Voltage-dependent anion channel, or VDAC
The proton motive force consists of two parts. ANSWER 1. Potential of the
membrane
2. gradient of protons
Potential for phosphoryl transfer: ANSWER ΔG°' (prime indicates at pH 7)
The electron transfer potential of NADH/FADH₂ is changed into the phosphoryl
transfer potential of ATP during oxidative phosphorylation.
ANSWER Convention: Oxidant + e⁻ -> reductant
Relationship between the change in reduction potential and the standard free
energy change ANSWER ΔG°' = -nF where n is the number of electrons and
ΔE'₀
F is equal to 23.06 kcal mol⁻¹ V⁻, the Faraday constant.
Change in reduction potential (volts) equals ΔE'₀.
Standard free energy change (kcal mol⁻¹) is equal to ΔG°'.
Lactate = reductant; pyruvate = oxidant - ANSWER
When oxygen is reduced to water, how much energy is released? ANSWER
Guidance Electrons migrate from -ve to +ve, from compounds with lower e⁻
affinity to those with higher e⁻ affinity, and from high energy to low energy.
Protons are pumped across the inner mitochondrial membrane using the energy.
