How is the energy used to make ATP via the electron-transport chain generated?
A) The energy from electrons bound to reduced coenzymes is used to create a steep electrochemical gradient.
B) Electrons bound to NADH are used to generate an H+ ion gradient across the inner mitochondrial membrane.
C) Electrons bound to FADH2 are used to generate a proton gradient across the inner mitochondrial membrane.
D) Electrons bound to NADH are used to generate a proton gradient across the inner mitochondrial membrane.
E) All of these are correct.
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