The electron transport chain's main purpose is to create a proton gradient, which Complex V can use to synthesize ATP.TrueFalse

Answer

True.

The electron transport chain (ETC) is a series of protein complexes located in the inner mitochondrial membrane. Its primary purpose is indeed to create a proton gradient across the membrane. As electrons are transferred through the complexes of the ETC, protons (H⁺ ions) are pumped from the mitochondrial matrix into the intermembrane space, resulting in a higher concentration of protons outside the matrix.

This proton gradient creates a form of potential energy known as the proton-motive force. Complex V, also known as ATP synthase, utilizes this proton gradient to drive the synthesis of ATP from ADP and inorganic phosphate (Pi) as protons flow back into the mitochondrial matrix through the enzyme. Therefore, the statement holds true.