Electron Transport Chain [HD Animation]

Electron Transport Chain [HD Animation]


during glycolysis and the tricarboxylic acid cycle oxidation of organic molecules results in production of reduced coenzymes such as nadh these coenzymes transfer hydrogens to the electron transport chain which is located in the bacterial cell membrane a hydrogen consists of a proton and an electron the electron transport chain consists of a series of special electron carrier proteins that shuttle electrons from NADH to a terminal electron acceptor such as oxygen electrons enter the electron transport chain when NADH transfers its protons plus electrons to a membrane embedded carrier protein the electrons are sequentially carried along the electron transport chain while the protons are shuttled to the outside of the membrane some of the electron carriers such as coenzyme q accept a proton from the inside of the cell membrane as it accepts electrons the proton is then transported through the membrane as electrons moved down the chain this increases the proton gradient across the membrane and enhances the proton motive force during aerobic respiration the last carrier protein transfers a pair of electrons to oxygen at the end of the electron transport chain and water is formed the enzyme ATP synthase utilizes the energy of the proton motive force to synthesize ATP this enzyme allows protons to pass back into the cell and couples the energy released in this process to the phosphorylation of ADP to form ATP

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