Biology 1002B Lecture Notes - Lecture 11: Competitive Inhibition, Chain Smoking, Irreversible Process
27 Feb 2017
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Hard to measure how much co2 is being brought in by photosynthesis because cellular respiration is also producing co2. To measure co2, chlamy cells put into co2 analayzer and measures change in co2 levels in sealed flask. How one can distinguish between gas exchange in mitochondria from that taking place in the chloroplast of a chlamydomonas cell. Y-axis represents net fixation of co2, incorporates co2 released from mitochondrial respiration. Identify major parts of a light response curve for carbon fixation. Room light: amount of co2 fixation increases linearly; more nadph, atp in order for calvin cycle to fixate co2 the more nadph, atp, the more the rate will increase. Outside: rate will plateau; calvin cycle can only work so fast. What metabolic processes and external factors may influence the change in rate as a function of light. Enzymes limit the rate, even if there is abundant nadph and atp: regeneration of rubisco inhibition from oxygen limits rate.
