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10 Cards in this Set
- Front
- Back
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How many electrons do NAD+/NADP+ accept at a time?
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2
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How many H+ are pumped accross the membrane per FADH2?
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6
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What is the result of blocking the transfer of electrons to O2?
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NADH, QH2, cyt b, cyt c1,and cyt c accumulate in reduced form while O2 remains oxidized.
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How many H+ are pumped accross the membrane in complex IV?
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2
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Chemiosmotic coupling
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As protons pass back through the membrane (from the intermembrane space to the matrix) through ATP synthase, ATP is formed
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How much of the energy released in the electron transfer process is stored in the proton gradient?
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Approximately 90%
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Cytochromes
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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)
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What are the three forms in which ubiquinone can exist?
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Ubiquinone (Q): form without any electrons
Ubiquinol (QH2): form with 2 electrons Semiquinone radical (QH) |
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Ubiquinone
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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
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What are the three main types of electron carriers?
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Ubiquinone, cytochromes, and iron-sulfur proteins
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