photosystems 12 Photosystem 1 & 2 Photosynthesis occurs in 3 briny stages: zip fastener is captured from sunlight, then it?s converted into chemical energy and stored in organic molecules. Photosystems are light harvesting units of the thylakoid membrane. each(prenominal) photosystem has four hundred pigment molecules. A photon hits the pigment molecules and travels by each molecule and then reaches the reply focalize as shown in figure 1-1. The thylakoid membrane has two photosystems, photosystem 1 & 2. The reaction center in photosystem 1 is called P700 because this pigment is best at absorbing 700 mm light.
Photosystem 2?s reaction center is called P680 because it is best at absorbing 680 mm light. Calvin Cycle The Calvin bike begins by incorporating Co2 from the air into molecules in the chloroplast. This action is called hundred fixation. The next thing it does is add electrons to the fixed carbon to attract it carbohydrate. The power of the Calvin cycle comes from NADPH....If you want to get a dear essay, order it on our website: Ordercustompaper.com
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