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They come from Photosystem ll. Photosystem ll gets them by ripping the electrons off of water by a process called photolysis. Electrons gain energy first in Photosystem ll, then later in photosystem l, through the absorption of energy from light.
Photosystem.
From energy in photons
From energy in photons
Excited electrons are transferred to an electron transport chain.
They come from Photosystem ll. Photosystem ll gets them by ripping the electrons off of water by a process called photolysis. Electrons gain energy first in Photosystem ll, then later in photosystem l, through the absorption of energy from light.
From energy in photons
Photosystem.
From energy in photons
From energy in photons
They absorb photons.
The thylakoid membrane contains 2 photosytems, known as Photosystem I and Photosystem II. Together, they function to absorb light and transfer energy to electrons.
From energy in photons
Photosystem
Photosystem 1
Photosystem II most likely evolved first because it provides the energy for producing ATP and passes its electrons to photosystem I.
Excited electrons are transferred to an electron transport chain.