BIOL 1201 Chapter : 9 Photosynthesis
Document Summary
Photosynthesis perhaps the most important reaction in biology . Approximately 140 to 180 x 109 tons (dry weight) of carbon are produced ( fixed ) each year: when a plant grows, the biomass of carbon comes from the air. All oil, coal, and natural gas is from photosynthesis. Light-dependent reactions: produce reducing power (nadpj, produce atp, byproduct is that it produces molecular oxygen (o2) that is in our. Chlorophyll a and chlorophyll b and accessory pigments: absorb light in the visible spectrum, located in the thylakoid membrane of the chloroplast. Light energy: used by photosystem i and photosystem ii. Light-dependent reactions: h2o is split, o2 is released; end product. How are the reducing power and atp produced by the light reactions used to synthesize biological molecules? (figure 10. 22) Atp and reducing power of the light reactions. Used in the benson-calvin cycle (the dark reactions: in the stroma of the chloroplast. Ultraviolet: short wavelength, high energy, damages biological molecules.
