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Tag Archives: carbon fixation

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The Calvin Cycle

ScienceBy William Anderson (Schoolworkhelper Editorial Team)July 8, 20101 Comment

– cyclic process in the stroma that converts carbon dioxide into carbohydrate molecules – three phases: 1) carbon fixation, 2) reduction reaction, 3) RuBP regeneration Phase 1: Carbon Fixation – C02 added to RuBP -> unstable 6-carbon intermediate -> 2 3-carbon PGAs –  required to occur three times, 3 CO2 + 3 RuBP -> 6…

Light Energy and Photosynthetic Pigments

ScienceBy William Anderson (Schoolworkhelper Editorial Team)July 8, 20103 Comments

Light Reactions: – require chlorophyll and take place in thykaloid membranes – absorb light energy and transfer it to ADP and NADP+ – energy is transferred to carbohydrate molecules in the Calvin cycle Carbon Fixation: – incorporate molecules of CO2(g) into organic molecules, such as glucose – require energy from ATP and NADPH – takes…

C4 and CAM Plants

ScienceBy William Anderson (Schoolworkhelper Editorial Team)July 7, 2010Leave a comment

– O2 competes with CO2 for rubisco’s active site – rubisco catalyzes two reactions: 1) addition of carbon to RuBP; forms 2 PGA molecules (photosynthesis) 2) addition of oxygen to RuBP; forms 1 PGA and one glycolate (photorespiration) – photorespiration decreases the production of carbohydrates by removing PGA from the Calvin cycle – glycolate is…

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