Biology 1002B Lecture Notes - Lecture 6: Atp Synthase, Light-Independent Reactions, Reduction Potential
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Carbon fixation/ primary productivity: photosynthetic organisms can use light energy to drive the process of converting carbon dioxide to sugar, classification of reaction. Anabolic: note: get diagram on slide, carbon dioxide has no usable energy, but glucose does (c-h bonds, neither carbon nor hydrogen are strongly electronegative. Therefore it"s easy to oxidize molecule with lots of c-h bonds and extract its energy. Photosynthesis = oxidation-reduction reaction: water is oxidized to oxygen, carbon dioxide is reduced to glucose, both oxidation and reduction reactions are not occurring near each other. Chloroplast has internal membrane called thylakoid membrane. Has own genome: chloroplast has complete complement (enzymnes, ribosomes) of everything needed for transcription and translation. 3000 protein required for chloroplast function: most of them are coded for by nuclear genes and imported, about 50 proteins are coded by chloroplast genome. Photosynthesis can be split into light reactions and calvin cycle spatially.
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