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AP Biology Ch. 10
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Is everywhere (Light is a form of electromagnetic radiation)…
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All energy on earth comes from the sun* To convert light energy into chemical energy we depend on: Plants (chloroplasts) Protists (chloroplasts) Cyanobacteria (cell membrane)
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Mesophyll cells: Contain many chloroplasts for photosynthesis Stoma cells: Guard cells allow for gas exchange
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Thylakoids: Disk-like structures filled with chlorophyll Stroma Surrounding fluid
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A pigment which absorbs electromagnetic radiation
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Absorbs two wavelengths of light: Blue: 420 nm Red: 660 nm
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CO 2 + H 2 O C 6 H 12 O 6 + O 2 carbon dioxide + water glucose + oxygen
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Sunlight strikes the PSII and excites electrons Excited electron splits H 2 O into H+ ions and O 2 gas
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Electrons flow through a series of membrane proteins moving H+ ions across the membrane
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Sluggish electrons receive another photon of light in PSI Excited electrons are passed to NADP changing into NADPH
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Collection of H+ ions pass through ATP synthase ADP is converted into ATP
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http://highered.mcgraw- hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/007243 7316/120072/bio13.swf::Photosynthetic%20Electron%20Transport%20and %20ATP%20Synthesis http://highered.mcgraw- hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/007243 7316/120072/bio13.swf::Photosynthetic%20Electron%20Transport%20and %20ATP%20Synthesis
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NADPH & ATP generated in light reactions run the Calvin Cycle CO 2 is converted into G3P through a series of reactions
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Many cycles produce glucose (C 6 H 12 O 6 ) in stroma
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http://highered.mcgraw- hill.com/sites/0070960526/student_view0/chapter5/animatio n_quiz_1.html http://highered.mcgraw- hill.com/sites/0070960526/student_view0/chapter5/animatio n_quiz_1.html
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Average: http://www.youtube.com/watch?v=ytLJFYyfLV8&safety_mode =true&persist_safety_mode=1 http://www.youtube.com/watch?v=ytLJFYyfLV8&safety_mode =true&persist_safety_mode=1 Awesomeness: http://www.youtube.com/watch?feature=endscreen&NR=1&v= x-t0sGyjfto http://www.youtube.com/watch?feature=endscreen&NR=1&v= x-t0sGyjfto
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