Electron flow down the electron-transport chain leads to the A) transport of protons across the inner mitochondrial membrane from inside the matrix to the intermembrane space. B) transport of protons across the inner mitochondrial membrane from the intermembrane space into the matrix. C) coupled synthesis of GTP. D) a dangerous imbalance of K⁺ ions across the mitochondrial membrane. E) None of the answers is correct.

Question

Quizplus · Accepted Answer

The electron transport chain (ETC) in mitochondria uses the energy from electrons to pump protons (H+) across the inner mitochondrial membrane from the matrix into the intermembrane space, creating a proton gradient that drives ATP synthesis.

Electron Flow Down the Electron-Transport Chain Leads to the