BIO120H1 Lecture Notes - Lecture 15: Lipophilicity, Douglas Mawson, Chemosynthesis
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BIO120H1 Full Course Notes
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Document Summary
Within the deepest mantles of the earth exists extremotrophs, which do not thrive on sunlight but rather use chemical oxidation. Alongside other organisms that fix organic carbon, these are quite abundant. The three raw ingredients to fix carbon are an energy source, an electron donor, an inorganic carbon source. In the photosynthetic passway, one sees a chemical reaction undergoing. First step is light, which attaches to the donor, and secondarily there is carbon in another pathway. The light pathway is converted into a chemical reaction nadph, and converts with co2 into sugar. C4 pathways are more expensive pathways, and found primarily in areas that are hot and dry. Under these conditions, c4 pathways which are expensive, can outcompete the previous c3 pathways. It comes as no surprise that c4 pathways area some of the worse weeds in the world. Cam photosynthesis uses a process where co2 is absorbed during the night-time.
