BIOL 2100 Lecture Notes - Lecture 10: Light-Harvesting Complex, Photosystem I, Accessory Pigment
9 May 2016
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Photosynthesis- conversion process that convert light energy from the sun into chemical energy that is stored in sugar and other organic molecules. Purple sulfur bacteria: heterotrophs- obtain organic material by the second major mode of nutrition. 10. 1: photosynthesis converts light energy to the chemical energy of food. Photosynthetic enzymes and other molecules are grouped together in a biological membrane, enabling the necessary series of chemical reactions too be carried out sufficiently. Photosynthesis most likely originated in a group of bacteria that had infolded regions of the plasma membrane containing clusters of such molecules. Endosymbiont theory- the original chloroplast was a photosynthetic prokaryote that lived inside an ancestor of eukaryotic cells. In some places, thylakoids are stacked in columns called grana: chlorophyll- the green pigment that gives leaves their color; resides in thylakoid membranes of chloroplast. Light energy absorbed by chlorophyll drives the synthesis of organic molecules in the chloroplast.
