Ch19 photosynthesis

Ch19 photosynthesis - Photosynthesis Chloroplast organelle...

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Unformatted text preview: Photosynthesis Chloroplast organelle of photosynthesis The Hill Reaction Plant extract + electron acceptor color change Only occurs with light Where do electrons come from? How does light produce electrons? Plants extract electrons from water. How does a plant capture energy from light? Various Pigments Harvest the Light Energy The energy is transferred to the photosynthetic reaction center Energy Equations Conversion of light energy Ground states vs. excited states Fluorescence excited state returning to ground state Exciton transfer instead of falling to ground state, energy transferred to neighbor vibrations. Light Harvesting Complex II (LHCII) 36 chlorophyll. 6 lutein Phycobilisome Why different wavelengths? Different organisms Live at different depths in Lakes, or are hidden under a Thick forest overhead. Different light harvesting Molecules are used to Obtain light energy depending On the environment How do we determine which wavelength is the best for a particular organism or light harvesting molecule? harvesting molecule?...
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This note was uploaded on 03/08/2012 for the course CHEM 481 taught by Professor Wood during the Fall '10 term at BYU.

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Ch19 photosynthesis - Photosynthesis Chloroplast organelle...

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