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Cards In This Set
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CYCLIC ELECTRON FLOW
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CYCLIC ELECTRON FLOW
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Step one
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Electrons become photoexcited within ps1 because of light energy absorbed by pigments
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Step two
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P700 electrons leave molecule, trapped by pea
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Step three
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Electrons passed along ETC of Fd -> cytochrome complex -> Pc -> p700 rxn center
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Step four
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ATP generated
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NONCYCLIC ELECTRON FLOW
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NONCYCLIC ELECTRON FLOW
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Step one
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Pigments absorb energy and channel it to the p680 reaction center
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Step two
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P680 chlorophyll a's electrons become excited, leave the molecule and are trapped by p.e.a.
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Step three
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E- that left the chlorophyll is replaced by h2o being split. left O combines with another, creating O2
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Step four
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Goes to P1 through ETC (plastoquinone (pq), cytochrome complex, and plastocyanin (pc)
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Step five
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Exergonic fall of electrons to lower energy level provides energy for synthesis of ATP
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Sidestep six
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LE energizes p700 chlorophyll a molecule in p1, and the hole left by the pea is filled by e- that gets to bottom of etc from p2
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Step seven
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Photoexcited electons are passed from ps1's pea down a second ETC through ferredoxin (Fd)
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Step eight
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Enzyme NADP+ reductase transfers electrons from Fd to NADP+. Two e- are required for its reduction to NADPH.
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CALVIN CYCLE
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CALVIN CYCLE
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