BIOS 240 Lecture Notes - Lecture 14: C3 Carbon Fixation, Stoma, Sulfur
17 Sep 2016
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Carboxylation rxn, also an oxygenation rxn-bringing oxygen into a sugar. One enzyme can do 8 rxns at a time. Brings c from co2 into pentose skeleton, makes intermed that"s very unstable. **enz under biochem rxn, is bottom of food chain, need rxn to make food. Doesn"t require any e. conditions set in stroma and biochem of enz, this rxn is continuous of fixation of co2 to sugar to organic acids. The org acids need to be put back into sugars. Pga is red"d by consuming nadph and adp to make sugar. 10 of the 12 g3p to make 6 rubp and glucose. Slide with starch image: chloroplast have granules, making starch-precipitates, not soluble, is hydrophobic. Plants store carbon by making starch which are a bunch of gluc molec"s bind together and store in chloroplast. When reach capacity to store starch, photosynth will have to stop. Since there"s too much gluc for platn to handle.
