The sequence of membrane proteins of the electron transport chain includes three transport proteins and other electron transport proteins.As the electrons from original glucose molecules move through the proteins,work is done.The electron transport chain produces a(n)_____________ concentration gradient.

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As the electrons move through the electron transport chain, they are pumped across the inner mitochondrial membrane, creating a gradient of protons (H+) on one side of the membrane. This gradient is used to drive ATP synthesis. Therefore, the electron transport chain produces a proton concentration gradient.

The Sequence of Membrane Proteins of the Electron Transport Chain