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Summarize the phases of oxidative phosphorylation starting with ETC receiving electron from NADH and FADH2 . Emphasize when the process is exergonic and when it is endergonic.
The final step in cellular respiration is oxidative phosphorylation. It takes place in the mitochondria. It is tied to an electron transport chain process.
Through a sequence of redox processes, electrons are moved from one member of the transport chain to another.
Steps of oxidative phosphorylation:
Transportation of NADH and FADH2 electrons:
Near the start of the transport chain, reduced NADH and FADH2 transfer their electrons to molecules. The electrons are then oxidised to NAD+ and FAD and used in additional processes of cellular respiration after being transferred.
Proton Pumping and Electron Transport:
The energy is released as the electrons travel from a higher to a lower energy level. The electrons are moved from the matrix to the intermembrane gap using some of the energy. As a result, an electrochemical gradient is created.
Oxygen splitting to form water:
After that, the electrons are transferred to the oxygen molecule, which splits in half and absorbs H+ to produce water.
While flowing back into the matrix, the H+ ions pass through an enzyme called ATP synthase. This regulates the flow of protons needed to make ATP.
The chemical reactions that release energy are used to fuel a chemical reaction that requires energy in oxidative phosphorylation.
Exergonic processes involve the movement of electrons along the electron transport chain, while endergonic processes involve the synthesis of ATP. These two processes are deeply embedded in the membrane. As a result, the movement of proteins will transfer energy from the electron transport chain to ATP synthase.