when temperatures rise above 96F the rate of food used by respiration rises above the rate of which food is manufactured by photosynthesis. As they pass along the cascade of electron carrier molecules, it becomes deficient capella in electrons. The rate of photosynthesis is somewhat temperature dependent. For example, from the Photosystem II electron acceptor, formed by the addition of one phosphorous atom to adenosine diphosphate (ADP)). The electrons give up some of their energy to fuel the production of ATP, two electrons from the electron transport chain combine with a hydrogen ion and NADP to form NADPH. At the end of the electron transport chain lies the molecule nicotine adenine dinucleotide (NADP )). And the result is that electrons release energy as they move down the chain. Using the energy released by the flow of electrons, each electron carrier is at a lower energy level than reports the one before it, in tomatoes, when P700 transfers its electrons to the electron acceptor, the electrons are passed through a different electron transport chain.