Biology 1002B Lecture Notes - Lecture 8: P680, Starch, Photosystem
18 Apr 2012
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Document Summary
Photosynthetic organisms are photoautotrophs and are classified as the primary producers of the earth. Photosynthesis is the major biological process that allows for energy to enter biosphere (important) Chlorophyll is abundance in aquatic and land environments: aquatic environments that are very cold are photosynthetic hotspots, not those that are hot. Two parts of photosynthesis: light dependent reaction and light independent reaction (calvin cycle) Transforming light energy into chemical energy (sugar) Definition: the light dependent conversion of co2 (inorganic carbon) into an organic form. Light dependent conversion of co2 (inorganic) into organic form. No useable energy in co2: can get electrons away from molecule oxygen too electronegative. Sugar: lots of usable energy, calories, c-h bonds not electronegative, easier to pull electrons away and therefore work can be done. Photosynthesis is an endergonic reaction as potential energy goes up. Photosynthesis is a redox reaction in which water is oxidized, carbon dioxide is reduced: the light reactions.
