Question
Explain the organisation and function of electron transport chain.
Answer :
Word Count : 443
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The electron transport chain (ETC) is a crucial component of cellular respiration, responsible for the transfer of electrons through a series of protein complexes, leading to the production of ATP. It is located in the inner mitochondrial membrane in eukaryotic cells and the plasma membrane in prokaryotes. The primary function of the ETC is to generate a proton gradient across the membrane, which drives the synthesis of ATP, the energy currency of the cell. The ETC is composed of four main protein complexes: Complex I (NADH dehydrogenase), Complex II (succinate dehydrogenase), Complex III (cytochrome bc1 complex), and Complex IV (cytochrome c oxidase), along with mobile electron carriers such as coenzyme Q (ubiquinone) and cytochrome c. These complexes are embedded in the inner mitochondrial membrane and work together to facilitate the transfer of electrons from high-energy molecules like
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