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lecture15 - Photosynthesis Photosynthesis represents two...

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19-1 Photosynthesis Photosynthesis Photosynthesis represents two processes light reactions : NADPH and ATP are produced dark reactions : ATP and NADPH provide the energy and reducing power for the fixation of CO 2 Plants require glucose for glycolysis and 6 CO 2 + 6 H 2 O C 6 H 1 2 O 6 + 6 O 2 Glucose H 2 O + NADP + NADPH + H + + 1 / 2 O 2 ADP + P i ATP + H 2 O
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19-2 Photosynthesis Photosynthesis Site of photosynthesis Prokaryotes : in granules bonded to the plasma membrane Eukaryotes : in chloroplasts Chloroplasts have: inner, outer, and thylakoid membranes thylakoid disks are stacked into grana trapping of light and production of O take place in
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19-3 Photosynthesis Photosynthesis Membrane structures in chloroplasts
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19-4 Photosynthesis Photosynthesis Chlorophylls a and b, and bacteriochlorophyll a Similar to heme group of hemoglobin, except has Mg at center Source of electrons for PSII
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19-5 Chlorophylls (Chl) a & b Chlorophylls (Chl) a & b Absorb red (600 - 700 nm) and blue (400 - 500 nm) light accessory pigments absorb in other portions of the visible spectrum and transfer energy to chlorophylls Chlorophylls arranged in photosynthetic units antennae chlorophylls gather light harvested light energy passed to specialized Chl molecules at a reaction center
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