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Question

Why is the ETC important?


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Solution

ETC (Electron transport chain):

  1. An electron transport chain is a collection of protein complexes and other molecules that transfer electrons from electron donors to electron acceptors via redox reactions (both reduction and oxidation occur at the same time) and couple this electron transfer with proton (H+ ion) transfer across a membrane.
  2. The electron transport chain contains many membrane-bound enzymes.
  3. From an energy standpoint, the ETC is the most significant stage of cellular respiration since it produces the most ATP.
  4. Energy is freed and used to attach a third phosphate group to adenosine diphosphate via a sequence of redox processes, resulting in ATP with three phosphate groups


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