Molecules released as waste products from photosystem II in photosynthesis and in cellular respiration are the final electron acceptors required by the electron transport chain. That molecule is O2.
The process of photosynthesis is a chemical that occurs in plant chlorophyll using carbon dioxide as raw material and sunlight absorbed by photosystem II using a wavelength of 680 nm or P680. This process is carried out to produce food, organic matter in the form of sugar and waste released by photosystem II in the form of O2.
Aerobic respiration is the process of glucose molecules producing energy in the presence of oxygen which will produce the remaining water and carbon dioxide. Electron transport is the final stage of aerobic respiration. O2 is the final electron acceptor needed by the electron transport circuit to produce air. O2 or oxygen will object to H ⁺ ions to form H2O. Then there is the process of chemiosmosis, namely the formation of ATP by the ATP synthase enzyme in the mitochondria.
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