Electron Transport Cycle-Chain - Unit 2 Review - 11-5-07

Electron Transport Cycle-Chain - Unit 2 Review - 11-5-07 -...

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UNIT 2 – CELLULAR RESPIRATION ( Electron Transport Cycle ) Ready to turn NADH and FADH2 into ATP, we apply the electron transport cycle There are three proton pumps and 2 transporters o The three pumps are: NADH dehyrodgenase Bc-1 complex Cytochrome oxidase complex o The two transporters are called: Quinone Cytocrome c 1.) The NADH dehydrogenase splits off of a proton from NADH to form NAD and 1 proton (H+). 2.) The proton (H+) is pumped across the membrane outside into the cytoplasm using the energy of the electron derived from the splitting of NADH 3.) The electron from NADH starts its journey and travels first to quinone 4.) The electron travels from quinone to the bc-1 complex (where a 2
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Unformatted text preview: nd proton is then pumped from the mitochondria to the cytoplasm the bc-1 complex itself is a proton pump) 5.) Then the electron travels from the bc-1 complex to “cytochrome c” 6.) From “cytocrome c” the electron is transported to cytocrome oxidase complex (where the electron reaches the end and oxygen forms water with the electron and proton [which comes from the cytoplasm through ATP Synthase using a proton gradient, not a pump]) 7.) As the protons pass from the cytoplasm into the mitochondria to be used to form water, ATP is formed with the ratio 1NADH = 3ATP. End of Electron Transport Cycle/Chain...
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