What is the difference between ubiquinone (Q) and ubiquinol (QH2) - Q is fully oxidized so it has
no electrons, QH2 is fully reduced so it has 2 more electrons and H+ than Q
What are the other sequentially acting electron carriers in the respiratory chain besides NAD and
flavoproteins - Hydropho...
Biochem Exam 3 Lecture 1 MCPHS
What is the difference between ubiquinone (Q) and ubiquinol (QH2) - Q is fully oxidized so it has
no electrons, QH2 is fully reduced so it has 2 more electrons and H+ than Q
What are the other sequentially acting electron carriers in the respiratory chain besides NAD and
flavoproteins - Hydrophobic quinone (ubiquinone, Q), Cytochrome (contain iron), Iron-sulfur
proteins
What is the final stage of cellular respiration and where does it happen - Oxidative
phosphorylation, in the mitochondria
What does oxidative phosphorylation couple - The oxidation of NADH or FADH2 to the reduction
of O2 to get H2O and formation of ATP
Where in the mitochondria are the components of the respiratory chain - Inner membrane
Briefly summarize the process of the respiratory chain - 1. Electrons flow through a chain of
membrane-bound carriers
2. This results in protons (H+) pumped from matrix to inter membrane space
3. H+ gradient drives ATP synthesis
Electrons are transferred from a substrate to which universal electron acceptors - NAD+, NADP+,
FAD, FMN
NAD+ or NADP+ accepts what and releases what, how many electrons at once - Accepts H- (H+
and 2 electrons), picks up a pair of electrons at once, releases a proton
How many electrons can FAD or FMN accept and transfer at a time - One or two electrons AT A
TIME
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