150-09respiration[1] - Foundations of Biological Science I...

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Foundations of Biological Science I (BioSci 150) C Reminder: look at the following redox reaction: Which molecules are being oxidized here (hint: assume the reaction to occur as written). Xe 2 + Y X + Ye 2 Respiration & Fermentation
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Foundations of Biological Science I (BioSci 150) C Respiration & Fermentation- getting G (free energy) from nutrients. Roles of cytoplasm, mitochondrial matrix and cristal membrane in energy metabolism Nutrient oxidation & e - carrier reduction Coupling exergonic reactions to the endergonic synthesis of ATP .
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Foundations of Biological Science I (BioSci 150) C 6CO 2 + 6H 2 O Free Energy Flow Through Life Cell ‘work’ C 6 H 12 O 6 + 6O 2 ADP + Pi ATP + H 2 O cell components photosynthesis respiration, fermentation 0 Follow the free energy from left to right through the blue arrows (pathways)…
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Foundations of Biological Science I (BioSci 150) C Figure 9.2b ATP: the energy currency of the cell G = -7.3 Kcal/mole of ATP For the reverse rxn: ADP + Pi ATP + H 2 O G = +7.3 Kcal/mole of ADP
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Foundations of Biological Science I (BioSci 150) C Glycolysis, the Krebs Cycle, Electron Transport and Oxidative Phosphorylation: the metabolic pathways that transfers free energy from glucose to ATP… 1 mole of glucose yields 686 kcal of G! C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O G = -686 Kcal/mole glucose The cell can get lots of energy from sugar:
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Foundations of Biological Science I (BioSci 150) C mitochondrion glycolysis glucose 2 ATP 2 pyruvate e- NADH Substrate-level phosphorylation 2 ATP Substrate-level phosphorylation electron transport Krebs cycle 32-34ATP oxidative phosphorylation cytoplasm NADH, FADH e- e-
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Foundations of Biological Science I (BioSci 150) C Glycolysis…
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150-09respiration[1] - Foundations of Biological Science I...

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