September 27-ch7

September 27-ch7 - September 27, 2007 Chapter 7 Photosystem...

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September 27, 2007 Chapter 7 Photosystem II Steps of ATP generation o Two photons absorbed by Photosystem II o Two electrons boosts out of the reaction center molecules o First electron carrier accepts two energized electrons Energy release from electrons is use to pump H+ into thylakoid compartment from stroma o H+ ions concentration gradient used to drive ATP synthesis (chemiosmosis) Photosystem I Photons of light absorbed by Photosystem I o Energy passed to two reaction center chlorophyll molecules Two high energy molecules boosted Maintaining electron flow Electrons from PSII flow one way to PSI Electrons leaving PSII replaced when H2) is split: o H2) ½ O2 + 2H+ + 2E- o Two electrons from water replace those lost when 2 photons boost two electrons out of PS II o Two hydrogen ions used Light independent reactions The C3 cycle captures carbon dioxide Carbon fixed during the c3 cycle is used to synthesize glucose NADPH and ATp from light dependtent reactions used to power
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This note was uploaded on 04/10/2008 for the course BIOLOGY 101 taught by Professor Beitch during the Spring '07 term at Quinnipiac.

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September 27-ch7 - September 27, 2007 Chapter 7 Photosystem...

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