Скачать или смотреть Photosynthesis: A Comprehensive Guide | Photosynthesis Notes

Brief details on Photosystem I (PSI) and Photosystem II (PSII):

A. Photosystem II (PSII):
•Location: Found in the thylakoid membrane of the chloroplast.
•Function: Absorbs light energy and initiates the process of photosynthesis by generating high-energy electrons.
•Key Molecules:
-Chlorophyll P680: Absorbs light at 680 nm wavelength.
•Reaction Center: Where light energy is converted into chemical energy.
•Water Splitting: PSII splits water molecules, releasing oxygen and providing electrons for the reaction.
•Electron Transport: Electrons move through the electron transport chain, creating a proton gradient across the thylakoid membrane.

B. Photosystem I (PSI):
•Location: Also located in the thylakoid membrane.
•Function: Receives electrons from Photosystem II and further boosts their energy.
•Key Molecules:
-Chlorophyll P700: Absorbs light at 700 nm wavelength.
•Reaction Center: Similar to PSII, facilitates electron transfer.
•Electron Transport: Electrons from PSII enter PSI, and NADP+ is reduced to NADPH, a key molecule in the Calvin cycle.

•Overall:
-Cooperation: PSII and PSI work together in the light-dependent reactions of photosynthesis.

-Electron Flow: Electrons move from water to NADP+, producing ATP and NADPH for the Calvin cycle.

-Oxygen Release: Oxygen is released during the water-splitting process in PSII.

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