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Unformatted text preview: Dehydrogenases transfer electrons from organic fuels to NAD+ NADH. NAD+ is reduced during glycolysis, pyruvate oxidation and the citric acid cycle. NADH is oxidized during oxidative phosphorylation (ETC). Oxidation of NADH is exergonic; reduction of NAD+ is endergonic. 4. What is substrate-level phosphorylation? During which phases of cellular respiration does substrate-level phosphorylation occur? Mode of ATP synthesis where an enzyme transfers a phosphate group from a substrate molecule (organic molecule) to ADP. Occurs in glycolysis and the citric acid cycle. 13. What is chemiosmosis? What is the name of the enzyme involved in making ATP? Chemiosmosis: using H+ gradient to do work (make ATP). ATP synthase is the enzyme that uses the H+ gradient to make ATP....
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- Spring '08