the high energy electrons now move down the electron transport chain as they are passed from photosystem 2 to photosystem 1.
The oxidative phosphorylation process, which produces ATP, is made up of a series of four protein complexes called the electron transport chain that couple redox processes to produce an electrochemical gradient. Both cellular respiration and photosynthesis take place in mitochondria. In the former, energy is released along with the electrons that are produced when organic molecules are broken down. In the latter, light-excited electrons join the chain and use the energy they release to create carbs.
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