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In: Biology

What is the order of electron flow in oxidative phosphorylation for the electrons coming from NADH?...

What is the order of electron flow in oxidative phosphorylation for the electrons coming from NADH? Additionally, What components in this electron flow are important for the production of ATP and what do these components do that is important?

Solutions

Expert Solution

​​​​​​During electron transport chain taking place in inner mitochondrial membrane, electrons flow from electron carrier having low redox potential to the electron carrier having higher redox potential. The flow of electron is as NADH reductase, ubiquinone, cytochrome reductase, cytochrome c and then cytochrome oxidase.

When electrons are passed from one electron carrier to the other, protons are also pumped from mitochondrial Matrix to intermembrane space. These protons are again pump back into the mitochondrial matrix with the help of enzyme ATP synthase. This leads to the formation of Differential concentration of protons across inner mitochondrial membrane. The electrochemical energy stored in Proton gradient is used by ATP synthase enzyme for the synthesis of ATP by phosphorylating ADP.

So, the components which are important for the production of ATP are all the electron Carriers because the lead to the formation of proton gradient which is utilised by ATP synthase enzyme.

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