2005_campbl10

2005_campbl10 - Photosytem Note transfer of energy rather...

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1 Chapter 9: Photosynthesis Important Point: Bioenergetics Photosynthesis Rxn Overview However, the above is a bit of a lie… Diversity of Photosynthesizers These are autotrophs
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2 Chloroplast (a plastid) Thylakoids are membrane-bound organelles inside of a membrane-bound organelle Photosynthesis (overview) “Dark” Reaction Carbon fixation Chloroplast Overview ± Thylakoids: Membrane “discs” arranged in stacks (grana, sing. granum) which contain chlorophyll and other important molecules Site where solar energy is trapped and converted into chemical energy (light reactions) ± Thylakoid membrane: Site of ATP synthesis ± Stroma: Thick fluid outside thylakoid membranes, surrounded by interior membrane Site of sugar synthesis (dark reactions) Energetics of Visible Light Red is less energetic Violet is more energetic Why Plants are Green? Green is what’s not Adsorbed
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3 Chlorophyll Photon Energy Boosts Electron
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Unformatted text preview: Photosytem Note transfer of energy rather than redox reactions Photosystems energy transfer energy transfer energy transfer energy transfer Light Reaction Z Scheme Energetics of Visible Light 680 nm, PS II 700 nm, PS I 4 Why Plants are Green? Photosytem Cyclic Electron Flow Non-Cyclic Flow (repeat) Oxidation of water regenerates photosystem II, generating O 2 in the process Note not NADH but NADPH Photophosphorylation Bioenergetics Proton-motive force Just like the lumen of endomembrane system, the orientation of the thylakoid space is equivalent to outside of the cytoplasm 5 Overview of Light Rxn All of this stuff you are responsible for from other slides Dont worry too much about names of specific ETS members Calvin Cycle Reducing power Energy Non-Cyclic Flow (repeat) The End...
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This note was uploaded on 06/03/2011 for the course BIO 113 taught by Professor Swenson during the Spring '08 term at Ohio State.

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2005_campbl10 - Photosytem Note transfer of energy rather...

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