There are two different light reaction cycles that occur in the thylakoid membrane within the chloroplast. The first, and most complex cycle is the non-cyclic. It begins with an H20 molecule splitting into 2H+ and ½ O2 in the process of photolysis. (During photolysis oxygen is released as a byproduct.) The two electrons lost from H20 are transferred to chlorophyll 680. Different pigments in Photosystem II can absorb specific wavelengths of light. The energy …showed first 75 words of 340 total…

…showed last 75 words of 340 total…Photosystem I. From this photosystem electrons move to a Primary Acceptor. The Primary Acceptor then sends the electrons to a chemical, ferredoxin. From ferredoxin they move to the Cytochrome complex. Between the Cytochrome complex and plastocynin energy for chemiosmotic synthesis of ATP is released. The electrons then cycles back to Photosystem I and repeats until a feedback mechanism slows the production because the Calvin-Benson cycle has enough of both ATP and NADPH to produce glucose.