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lect 14 - Photosynthesis Harnessing the energy from...

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Photosynthesis Harnessing the energy from sunlight
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Learning Goals Learn the common elements of photosynthesis Learn about photosynthesis in purple bacteria green bacteria
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Use light energy to make ATP and reducing power Energy yields of ATP are limited only by photons and efficiency of light energy capture Photophosphorylation A photon-driven, PMF-generating process Photosynthesis - General concepts
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Why use light? Wavelength Color of light kcal/einstein* 400 Violet 71.8 500 Blue 57.7 600 Yellow 47.8 700 Red 40.6 einstein = 6.023 x 1023 photons, i.e., one mol of photons
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Types of photosynthesis Oxygenic Generates oxygen H2O as source of electrons Cyanobacteria Anoxygenic Does not generate oxygen Many sources Purple and green bacteria, heliobacteria
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Where do photosynthetic bacteria live?
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How do photosynthetic bacteria survive in a competitive environment?
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How do photosynthetic bacteria survive in a competitive environment?
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Click to edit Master subtitle style The core structure of chlorophylls Brock Biology of Microorganisms,
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Click to edit Master subtitle style Why are there so many chlorophylls? Brock Biology of Microorganisms,
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Click to edit Master subtitle style Cyclic anoxygenic photosystem I Brock Biology of Microorganisms,
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Acyclic oxygenic photosystem (PS) II Brock, Biology of Microorganisms
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Different systems for capturing photons Plant-type Bacterial-type Organisms
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