The P680+ molecule is the strongest known biological oxidizing agent. Based on what you know about its function in PSII, why is this a necessary feature of P680+? P680+ obtains electrons from the oxygen atom in a water molecule, so it must have a stronger attraction for electrons than oxygen has. P680+ is the molecule that transfers electrons to plastoquinone (Pq) of the electron transfer system. P680+ transfers its electrons to reduce NADP+ to NADPH. P680+ is the receptor for the most excited electron in either photosystem of photosynthesis.