Excited electrons from PSII enter an ETC in the thylakoid membrane, losing energy to pump protons into the thylakoid, creating an electrochemical gradient. These protons return to the stroma via ATP synthase (chemiosmosis), producing ATP (photophosphorylation), with de-energized electrons then taken up by PSI.
Excited electrons from PSII enter an ETC in the thylakoid membrane, losing energy to pump protons into the thylakoid, creating an electrochemical gradient. These protons return to the stroma via ATP synthase (chemiosmosis), producing ATP (photophosphorylation), with de-energized electrons then taken up by PSI.
| Front | light dependent reactions: production of ATP via an ETC: step, process |
|---|---|
| Back | 2; Ps2 excited electrons transferred to ETC within thylakoid membrane, electrons pass through ETC, energy used to translocate protons into thylakoid, proton build up creates electrochemical gradient, protons return to stroma via ATP synthase (chemiosmosis), photophosphorylation, de-energised electrons taken by Ps1 |
Tags: 8_3_photosynthesis
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