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10 Cards in this Set

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  • Back
How many electrons do NAD+/NADP+ accept at a time?
2
How many H+ are pumped accross the membrane per FADH2?
6
What is the result of blocking the transfer of electrons to O2?
NADH, QH2, cyt b, cyt c1,and cyt c accumulate in reduced form while O2 remains oxidized.
How many H+ are pumped accross the membrane in complex IV?
2
Chemiosmotic coupling
As protons pass back through the membrane (from the intermembrane space to the matrix) through ATP synthase, ATP is formed
How much of the energy released in the electron transfer process is stored in the proton gradient?
Approximately 90%
Cytochromes
Type of electron carrier; contain an iron containing heme prosthetic group; accepts 1 electron; strong characteristic absorption of visible light due to heme group; three classes (a, b, and c)
What are the three forms in which ubiquinone can exist?
Ubiquinone (Q): form without any electrons
Ubiquinol (QH2): form with 2 electrons
Semiquinone radical (QH)
Ubiquinone
AKA coenzyme Q or Q; lipid soluble (hydrophobic) due largely to its hydrophobic side chain; freely diffusible within the membrane; can accept 1 or 2 electrons; can exist in 3 different forms
What are the three main types of electron carriers?
Ubiquinone, cytochromes, and iron-sulfur proteins