BIOL-Q 201 Lecture Notes - Lecture 13: Light-Independent Reactions, Light-Dependent Reactions, Carbon Fixation
Document Summary
Photosynthesis: plants are both autotrophs and producers, autotroph (definition): Organism that makes its own food: photoautotroph (definition): Uses the energy from sunlight and carbon from co2 to produce food molecules: producer (definition): An organism that makes organic food molecules from co2, A molecule: gains electrons, gains hydrogen, gains energy, oxidation: A molecule: loses electrons, loses hydrogens, loses energy, reactions of cellular respiration, c6h12o6 + 6 o2 6co2 + 6h2o, overview: photosynthesis occurs in two phases, first stage of photosynthesis: Light energy is converted to chemical energy of atp. Nadph is also produced: it temporarily stores h+ and energy. O2 is released as a by-product of the light reactions: second stage of photosynthesis: Carbon from co2 is incorporated into organic compounds (= carbon fixation). Nadph from the light reactions provides h+ and electrons for making the sugar. Atp from the light reactions provides energy to produce the sugar: two phases of photosynthesis, light reactions, require:
