OXIDATIVE PHOSPHORYLATION POGIL TEST QUESTIONS
AND CORRECT ANSWERS
What is the location of the electron transport chain? ANSWER in the inner
membrane of the mitochondria
Where is the largest concentration of hydrogen ions in the electron transport
chain? The space between the inner and outer membranes is known as the
intermembrane space.
How can ions of hydrogen get into the gap between membranes? ANSWER:
They spread via assisted diffusion through embedded protein channels.
Why does it take energy for the hydrogen ions to pass through the membrane
and enter the intermembrane space? ANSWER: The ions are traveling from low
to high concentrations against their concentration gradient.
The electrons with high potential energy that pump hydrogen ions across the
inner mitochondrial membrane are carried by which molecules? The answers
are FADH2 and NADH.
Where did NADH and FADH2, the electron acceptor molecules, originate? The
Krebs cycle, glycolysis, and the link reaction all produce them (the link reaction
can be regarded as a component of the Krebs cycle).
What else is created when the electron acceptor molecules release their
electrons? ANSWER H+ ions
Is it oxidation or reduction when an electron is released from an electron
acceptor molecule? ANSWER oxidation
After the electron has passed through the electron transport chain, which
molecule is the last one to accept it? ANSWER oxygen
Which substance is the end result of the electron transport chain? ANSWER
H2O
Does the electron transport chain generate any ATP? ANSWER No.
AND CORRECT ANSWERS
What is the location of the electron transport chain? ANSWER in the inner
membrane of the mitochondria
Where is the largest concentration of hydrogen ions in the electron transport
chain? The space between the inner and outer membranes is known as the
intermembrane space.
How can ions of hydrogen get into the gap between membranes? ANSWER:
They spread via assisted diffusion through embedded protein channels.
Why does it take energy for the hydrogen ions to pass through the membrane
and enter the intermembrane space? ANSWER: The ions are traveling from low
to high concentrations against their concentration gradient.
The electrons with high potential energy that pump hydrogen ions across the
inner mitochondrial membrane are carried by which molecules? The answers
are FADH2 and NADH.
Where did NADH and FADH2, the electron acceptor molecules, originate? The
Krebs cycle, glycolysis, and the link reaction all produce them (the link reaction
can be regarded as a component of the Krebs cycle).
What else is created when the electron acceptor molecules release their
electrons? ANSWER H+ ions
Is it oxidation or reduction when an electron is released from an electron
acceptor molecule? ANSWER oxidation
After the electron has passed through the electron transport chain, which
molecule is the last one to accept it? ANSWER oxygen
Which substance is the end result of the electron transport chain? ANSWER
H2O
Does the electron transport chain generate any ATP? ANSWER No.
