POGIL Oxidative Phosphorylation Key Solution
,Where is the electron transport chain located? - VERIFIED ANSWERwithin the inner mitochondrial
membrane
In the electron transport chain, where is the highest concentration of hydrogen ions located? - VERIFIED
ANSWERintermembrane space (between inner and outer membranes)
How do hydrogen ions reach the intermembrane space? - VERIFIED ANSWERthey diffuse through
embedded protein channels via facilitated diffusion
, Why is energy required to move the hydrogen ions across the membrane into the intermembrane
space? - VERIFIED ANSWERthe ions are moving against their concentration gradient, from low to high
concentration
What molecules carry the high potential energy electrons used to pump hydrogen ions across the inner
mitochondrial membrane? - VERIFIED ANSWERNADH and FADH2
Where did the electron acceptor molecules (NADH and FADH2) come from? - VERIFIED ANSWERthey're
produced in glycolysis, the link reaction, and the Krebs cycle (link reaction may be considered part of the
Krebs cycle)
When electrons are released from the electron acceptor molecules, what else is produced? - VERIFIED
ANSWERH+ ions
Is the release of an electron from an electron acceptor molecule oxidation or reduction? - VERIFIED
ANSWERoxidation
What molecule is the final electron acceptor after the electron has moved through the electron
transport chain? - VERIFIED ANSWERoxygen
What compound is formed as a final product of the electron transport chain? - VERIFIED ANSWERH2O
Is any ATP produced in the electron transport chain? - VERIFIED ANSWERNo
Is any ATP used in the electron transport chain? - VERIFIED ANSWERNo
Describe the movement of hydrogen ions through the membrane during chemiosmosis. - VERIFIED
ANSWERthe hydrogen ions move from a high concentration in the intermembrane space to a low
concentration in the mitochondrial matrix through ATP synthase via facilitated diffusion
Would free energy be required for the hydrogen ions to move from the intermembrane space to the
mitochondrial matrix? - VERIFIED ANSWERNo, because they're moving from high to low concentrations
,Where is the electron transport chain located? - VERIFIED ANSWERwithin the inner mitochondrial
membrane
In the electron transport chain, where is the highest concentration of hydrogen ions located? - VERIFIED
ANSWERintermembrane space (between inner and outer membranes)
How do hydrogen ions reach the intermembrane space? - VERIFIED ANSWERthey diffuse through
embedded protein channels via facilitated diffusion
, Why is energy required to move the hydrogen ions across the membrane into the intermembrane
space? - VERIFIED ANSWERthe ions are moving against their concentration gradient, from low to high
concentration
What molecules carry the high potential energy electrons used to pump hydrogen ions across the inner
mitochondrial membrane? - VERIFIED ANSWERNADH and FADH2
Where did the electron acceptor molecules (NADH and FADH2) come from? - VERIFIED ANSWERthey're
produced in glycolysis, the link reaction, and the Krebs cycle (link reaction may be considered part of the
Krebs cycle)
When electrons are released from the electron acceptor molecules, what else is produced? - VERIFIED
ANSWERH+ ions
Is the release of an electron from an electron acceptor molecule oxidation or reduction? - VERIFIED
ANSWERoxidation
What molecule is the final electron acceptor after the electron has moved through the electron
transport chain? - VERIFIED ANSWERoxygen
What compound is formed as a final product of the electron transport chain? - VERIFIED ANSWERH2O
Is any ATP produced in the electron transport chain? - VERIFIED ANSWERNo
Is any ATP used in the electron transport chain? - VERIFIED ANSWERNo
Describe the movement of hydrogen ions through the membrane during chemiosmosis. - VERIFIED
ANSWERthe hydrogen ions move from a high concentration in the intermembrane space to a low
concentration in the mitochondrial matrix through ATP synthase via facilitated diffusion
Would free energy be required for the hydrogen ions to move from the intermembrane space to the
mitochondrial matrix? - VERIFIED ANSWERNo, because they're moving from high to low concentrations
