Match each component of the electron transport chain with its description. drag the terms on the left to the appropriate blanks on the right to complete the sentences. helpreset fe-s complex iii q (ubiquinone) nadh o2 (molecular oxygen) is a multi-protein complex within the electron transport chain. is a nonprotein organic electron carrier within the electron transport chain. donates electrons to the electron transport chain. is a prosthetic group present in several components of the electron transport chain. is the final electron acceptor of the electron transport chain.