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Electron Transport Chain
Biology 200 Lecture Notes
7
Biology
Undergraduate 2
07/20/2011

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Term
If found, energy is readily accessible from _________.
Definition
Glucose.
Term
Why do cells need an energy "currency?"
Definition
Allows specialization of energy-creation machinery, allows energy storage in a non-transient form, enables coupling of energetic reactions.
Term
ATP Synthase
Definition
Large, intermembrane, multi subunit, located in the inner mitochondrial membrane. Creates ATP through oxidative phosphorylation.
Term
ATP Synthase works best with...
Definition
high levels of H+ outside the membrane, low levels of H+ inside the membrane.
Term
Where does the electron transport chain take place?
Definition
In the inner membrane and cristae of the mitochondrion.
Term
In the last step of the electron transport chain, molecular oxygen was used as the final low-energy electron acceptor. Where does the oxygen come from?
Definition
From your lungs and cardiovascular system.
Term
How does the electron transport chain work?
Definition
Electrons are carried from one complex to another by Q or cytochrome C; Q also shuttles protons across the membrane. Complexes I and IV use the potential energy released by the redox reactions to pump protons from the mitochondrial matrix to the intermembrane space.
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