The functioning of an electron transport chain is analogous to

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The movement of electrons through the electron transport chain is similar to the movement of a Slinky toy going down a flight of stairs because it involves a step-by-step process of energy transfer. Just as the Slinky toy moves down one step at a time, the electrons move through a series of protein complexes in the electron transport chain, each step releasing a small amount of energy that is used to create a proton gradient across the mitochondrial inner membrane.

The Functioning of an Electron Transport Chain Is Analogous to