oxidative phosphorylation Flashcards
what is oxidative phosphorylation
process where energy carried by electrons from reduced coenzymes is used to make ATP
where does oxidative phosphorylation occur
inner mitochondrial membrane
what starts off oxidative phosphorylation
hydrogen atoms are released from NADH and FADH via oxidation
what happens to the hydrogen atoms split off from reduced coenzymes
they are split into protons and electrons
what happens to the electrons provided by the hydrogen atoms
move along the electron transport chain made up of electron carriers losing energy at each carrier
what is the energy lost from the electrons used for
pumping protons from the matrix into the intermembrane space
how is an electrochemical gradient formed by proton pumps
intermembrane space has a higher conc of protons than the matrix
how do the protons go back to the matrix
down the electrochemical gradient via ATP synthase
what does the movement through ATP synthase cause
ADP and Pi join to form ATP
what is chemiosmosis
the process of ATP production driven by the movement of hydrogen ions across a membrane due to the electron transport chain
in the matrix, at the end of the transport chain what happens
protons, electrons and oxygen from the blood combine to form water
what is oxygen acting as at the end of the transport chain
final electron acceptor
how much ATP is made from one reduced NAD
2.5
how much ATP is made from one reduced FAD
1.5
what happens to the oxidised coenzymes
reused in the krebs cycle
