When light energy excites electrons in photosystem II, where do the electrons that replace them come from?

oh we have just done this in biology recently... photolysis occurs where it splits apart water molecules to make electrons and hydrogen ions (the H+ is used to reduce NaDP later on) and also O₂ is made as a by product
basically this is the equation 2H₂O⇒4e⁻ + 4H⁺ where the electrons replace the lost ones in chlorophyll
hope this helped :)

Answered by atahseen | 2024-06-10

In photosystem II, the electrons lost from chlorophyll when excited by light are replenished by splitting water molecules through a process called photolysis. This reaction produces electrons, protons, and oxygen, ensuring that the photosynthetic process can continue uninterrupted. The oxygen released is a valuable by-product for the environment.
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Answered by atahseen | 2024-12-26