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11 - NADPH is also formed The Dark Reactions Utilization of...

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4/5/11 Photosynthesis Energy of a photon depends on wavelength Planck’s Constant H= Planck’s Constant C=speed of slight lamda=wavelength (~400-700nm for visible light Light hits chlorophyll, which can do many things. Give energy absorbance as heat or fluorescence or production of radicals or exciton transfer. WE concentrate on the one where something is reduced. Photooxidation is the important one. Function of light harvesting complexes Chorophyll excites an electron and they all end up transferring energy adjacent to the electron transport system. **Exciton transfer eventually brings the energy to the chlorophyll at the reaction center. The Light Reactions Involves a series of electron transfers and fore formation of ATP in a manner similar to that of the mitochondrial electron transport pathway and oxidative phosphorylation.
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Unformatted text preview: NADPH is also formed The Dark Reactions Utilization of ATP… Plastoquinone Lipid soluble and can oxidized and reduced. The Dark Phase The light phase has resulted….ect. The Rubisco Reaction This enzyme adds CO2 to a five carbon sugar and then claves the product to two three carbon units Reaction itself doesn’t require ATP or NADPH but the transformation of the rubisco product to the three carbon sugar require both ATP and NADPH. Net Equation for the Calvin Cycle 3CO2 + 9ATP + 6NADPH yields Glyceraldehyde-3-Phosphate + 9ADP +8Pi +6NADP^+ Regulation of Carbon fixation All mechanisms for regulating the Calvin cycle are linked to the availability of light Ex. High pH activates carboxylation of rubisco...
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