Contrast the electrons transport chain in photosynthesis with cellular respiration by identifying the source of the high energy electron

Explanation:

In photosynthesis, reaction centers are a complex of protein-bound chlorophyll molecules (called CABs) and quinones, molecules that can be oxidized or reduced by accepting or donating electrons. The source of electrons in photosynthesis is water and their final receptor is NADP +, which is reduced to NADPH. During electron transfer, the protons (H +) of the H atoms are sent into the thylakoid through their membranes, producing an energy gradient. This electrochemical gradient generates enough energy to phosphorylate ADP and produce ATP, similar to the oxidative phosphorylation that occurs in mitochondria.

Meanwhile, the final stage of glucose molecule fragmentation is electron transport, which involves a series of electron transporters and enzymes located on the inner membranes of mitochondria. Throughout this series of carriers, the high energy electrons, accepted by NADH and FADH2 during the Krebs cycle, are transferred to oxygen. Each time an electron pair passes through the electron transport chain, ATP molecules form from ADP and phosphate.

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