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13_EnergyPath1W11_bacteria and archaea

13_EnergyPath1W11_bacteria and archaea - How to Eat Almost...

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How to Eat Almost Anything Energy and Building Blocks Energetic pathways – ATP production – Organic molecules as building blocks Bacteria and Archaea Eschel Ben-Jacob, Bacteria as Art http://star.tau.ac.il/~eshel/gallery.html
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ATP Production: Examples Oxygenic Photosynthesis Aerobic respiration – Electron donor: glucose or
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ATP Production: Examples Nitrogen Fixing Bacteria Electron donor: ferredoxin Electron acceptor: N 2 (from air) Byproduct: Ammonia Nitrogen is cycled through soils Each type of bacteria uses byproduct of another species as electron donor
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Fixation by bacteria and archaea Decomposition by bacteria, archaea, fungi Uptake from soil or seawater Uptake from soil Decomposition Uptake from soil or seawater Decomposition Denitrification by bacteria and archaea Nitrification by bacteria Nitrification by bacteria and archaea Freeman 28.13
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ATP Production: Examples Sulfate reducing bacteria Electron Donor: Organic compounds, H 2 Electron Acceptor: Sulfate, sulfide, sulfur Generate H 2 S (rotten egg smell) swamps, intestinal bacteria typically need anaerobic environment Sulfur oxidizing bacteria Electron Donor: H 2 S Electron acceptor: O 2 (aerobic) Fix carbon in deep sea vents
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