21 - Mitochondria - Mitochondrion and Electron Transpor...

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Unformatted text preview: Mitochondrion and Electron Transpor Mitochondrion and Electron Transport Learning Objective Structure of the mitochondrion Learning Objectives Transport systems of the mitochondrion The electron transport chain Coenzymes of the electron transport chain Cytochromes Cytochromes NADH and FADH 2 NADH and FADH 2 Fig. 18-1 The sites of electron transfer that form NADH and FADH 2 in glycolysis and citric acid cycle Two Half-Reactions of Complete Oxidation of Glucos Oxidation of Glucose Overall Reaction C 6 H 12 O 6 + 6 O 2 ! 6 CO 2 + 6 H 2 O Overall Reaction: Two half-reactions: C 6 H 12 O 6 + 6 H 2 O ! 6 CO 2 + 24 H + + 24 e- Glycolysis and citric acid cycle 6 O 2 + 24 H + + 24 e- ! 12 H 2 O Electron Transport Chain Electron Transport Chain The Fate of Electrons Released upon Gl O id ti Glucose Oxidation The elementary steps of the first half-reaction take place in the cytosol (glycolysis) and in the mitochondrion (the citric acid cycle). The released 12 electron pairs reduce 10 NAD + and 2 FAD yielding 10 NADH and 2 FADH 2 . 2 Elementary steps of the second half-reaction take place in the mitochondrion The 12 electron pairs move from NADH and mitochondrion. The 12 electron pairs move from NADH and FADH 2 to the electron transport chain that includes more than 10 redox centers in four enzyme complexes ....
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21 - Mitochondria - Mitochondrion and Electron Transpor...

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