BSCI 170 Study Guide - Midterm Guide: Pyruvate Dehydrogenase, Intermembrane Space, Glycogen

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Redox reactions: electrons are transferred between reactants: electrons usually transferred in form of hydrogen ions, reduced: gains electron(s, oxidized: loses electron(s, reduction agent: gives up electron(s, oxidation agent: accepts electron(s) Nad+/nadh: electron carrier: nad+ = oxidized state, nadh = reduced state, nadh transfers electrons in the etc to o2 the final electron acceptor. Oxygen is needed to recycle nad+ for the whole process: both nadh and atp are constantly recycled between states to run the processes. Electron transport chains: series of proteins complexes and organic molecules embedded in inner mitochondrial membrane, series of oxidation and reduction reactions. the final electron acceptor is molecular oxygen (o2) Oxidation is the loss of electrons and reduction is the gain of electrons by molecules. One can usually follow reduction and oxidation by following the movement of hydrogen atoms. these reactions always occur together and are called redox" reactions.

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