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25_printout - Announcements review Lecture 25 Reading for...

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Lecture 25 Reading for today: pages 742-749, 752-761 Reading for tomorrow: pages 773-783, 851-857 Assigned problems: N&C: Ch. 19: #31, 36 SG: p.250: #7, 8 Yesterday: Oxidative Phosphorylation Today: a bit more on ATP synthase Photosynthetic phosphorylation (the “light reactions”) Announcements / review
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CYTOSOL 4 H + flow back into mitochondrial matrix per ATP produced: 3 for ATP synthesis (ATP synthase), 1 for ADP+P i transport into mitochondria through ____________( Fig. 19-28 ) Proton accounting Different for succinate or Acyl - CoA dehydrogenase : only 6 protons pumped per: (6 H + / O) x (1 ATP / 4 H + ) = 1.5 “P/O” ratio : # of ATPs produced per atom of Oxygen reduced ( ½ O 2 ) 4e - to reduce O 2 => 10 H + pumped out per 4 H + flow back per (10 H + PUMPED / 1 Oxygen atom reduced ) x (1 ATP / 4 H + )= “P/O” = 2.5
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But, it ʼ s not totally one way: We give them plenty of the CO 2 they need to synthesize carbohydrates. Today: Tomorrow: Amazing plants convert light energy to chemical energy Photosynthesis includes both the “ Light reactions ” ( photophosphorylation ) and the “ Dark reactions ” (
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