BIOL 1108 Chapter Notes - Chapter 8: Cyanobacteria, Plastoquinone, Atp Synthase
Document Summary
Photosynthesis is biochemical process for building carbohydrates using energy from sunlight and carbon dioxide taken from air. Photosynthesis occurs among prokaryotic as well as eukaryotic organisms, on land as well as sea. Takes place almost everywhere sunlight is available to serve as source of energy. In ocean, photosynthesis occurs in surface layer extending to 100 m deep, called photic zone, through which enough sunlight penetrates to enable photosynthesis. On land, photosynthesis occurs most readily in environments that are moist and warm. Photosynthetic organisms have evolved adaptations that allow them to tolerate wide range of environmental conditions. During photosynthesis, co2 molecules reduced to form higher-energy carbohydrate molecules. Requires both input of energy from atp and transfer of electrons from electron donor. In photosynthesis carried out by plants and algae, ultimate electron donor is water. Absorbed sunlight provides energy that drives electrons through photosynthetic electron transport chain. Movement of electrons through transport chain used to produce atp and.
