which of the following statements about mitochondrial chemiosmosis is not true? responses a proton gradient is established across the inner membrane of the mitochondrion. a proton gradient is established across the inner membrane of the mitochondrion. the potential energy released from the mitochondrial proton gradient is used to produce atp. the potential energy released from the mitochondrial proton gradient is used to produce atp. the mitochondrial proton gradient provides energy for muscle contraction. the mitochondrial proton gradient provides energy for muscle contraction. proteins embedded in the inner mitochondrial membrane play an important role in atp synthesis. proteins embedded in the inner mitochondrial membrane play an important role in atp synthesis. heat energy is required to establish the electron transport chain.