Answer
The energy released during redox reactions helps in the active transport of protons across membranes. This, in turn, helps in establishing a proton gradient. When there are more protons but there is an insufficient amount of energy available to transport them, the transport of protons stops. As a result, the ETC will stop
Work Step by Step
The establishment of the proton gradient drives ATP synthesis. Failure in processes that generate the proton gradient, in turn, halts ATP synthesis.