BIOL 1010U Lecture Notes - Lecture 10: Chloroplast Membrane, Phototroph, Radiant Energy
Document Summary
Life depends on absorption of light energy from the sun. Not very efficient ~4% of light actually used. Ex: cyanobacteria (prokaryotes, first route of photosynthetic process) algae, lower plants, higher plants. Chloroplasts 2 membranes (outer and inner chloroplast membrane) photosynthetic processes happen on thylakoids. Photoautotrophs use water, co2 and light energy. Photoautotrophs produce o2 and carbohydrate (with stored energy in bonds) Overall reaction: 6co2, + 6h2o c6h12o6 + o6. Water is being oxidized to oxygen and co2 is reduced to c6h12o6. Traps energy from sunlight into bonds of energy carriers (atp and. Nadph) nadp+, this is light dependent, involve membranes. Energy then carbohydrates transferred to and stored in chemical bonds of. Light energy comes in packets called photons that have wavelike characteristics. When a photon of light meets a molecule: Photon may be taken in (absorbed: photon disappears, energy transferred to absorbing molecule. Organisms need way to capture light energy. Photosynthetic organisms use special molecules called pigments.
