Biology 1002B Lecture Notes - Lecture 9: Light-Independent Reactions, Komidashi, Carbon Fixation

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Not so easy because mitochondria are evolving, producing co2. Co2 fixation rate, how much is actually fixed. Micromoles carbon per cell per minute is how you measure this rate. Co2 fixation in the dark, photosynthesis is off, below zero. Only thing your measuring is rate of mitochondrial respiration, which produces carbon. In room light: increase in fixation, linear increase in rate with more exposure to light. More light, more photochemistry is reaction center in ps2. More of the nadph and atp that you need to fixate to. As you generate more products of light reactions to be consumed in calvin cycle, calvin cycles can turn faster and fix more co2. Rate of calvin cycle is directly proportional to products of light reactions. Won"t keep going up with increase light because the enzymes in calvin cycle can"t work any faster than their maximum rate. Calvin cycle will still go at it"s set maximum speed.

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