When chlorophyll molecules are struck by the sunlight they release 2 electrons that flow into the electron transport chain. to keep the process of photosynthesis running the chlorophyll molecules find replacement electrons. what is the source of these replacement

Answer; splitting of water

Explanation:the first photo system gets excited when it absorbs a photon of light from the sun,it looses electron

.this electron definiency is replaced by the splitting of water through light energy and the splitting resulting in the release of electrons and hydrogen ion,which is involved in the production of ATP

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

but there is no

i guess you forgot putting it.