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Chapter 10 (Linear Electron Flow (Each excited electron passes from…
Chapter 10
Linear Electron Flow
- Each excited electron passes from primary electron acceptor via an electron transport chain. Each component carries out redox reactions as electrons flow down
- Potential energy that is stored in the proton gradient is used to make ATP
- Enzyme catalyzes the spiltting of a water molecule into two electrons; the hydrogen atoms are released into the thylakoid space and the oxygen atom joins with another oxygen forming O2
- Light energy has been transferred via light-harvesting pigments to the PS1 reaction center; P700 can now act as an electron acceptor
- Electron is then transferred from the P680 to the primary electron acceptor
- Photoexcited electrons are passed in a series of redox reacitons from the primary electron acceptor down a second chain through the protein ferredoxin
- Photon of light strikes a pigment molecule boosting one electron to a higher energy level until it gets to the P680 pair of chlorophyll a
- NADP+ reductase catalyzes the transfer of electrons from Fd to NADP+
Chloroplasts
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Chlorophyll, the green pigment, resides in the thylakoids
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