Answer: (B) Electron transport chain will be the correct answer Explanation: The electron transport chain is a s equence of redox processes that occur during cellular respiration, as well as subsequent stages of glycolysis and the citric acid cycle where glucose metabolism can utilize ambient oxygen. Electron carriers predominantly decrease oxygen in the presence of glucose as a prerequisite during glycolysis and the citric acid cycle, and following this ETC process, water molecules are ... It contains the electron transport chain (ETC) complexes. Electron Transport Chain (ETC): The ETC is depicted as a series of protein complexes embedded in the IMM. These complexes (e.g., Complexes I, II, III, and IV) facilitate the transfer of electrons from electron donors (e.g., NADH, FADH2) to electron acceptors. Oxygen acts as the final electron acceptor in the electron transfer chain , resulting in the formation of H 2 O. This is essential because without it, the electron transfer chain cannot function resulting in a lack of oxidative phosphorylation in the inner membrane of the mitochondria. Further more, the lack of functioning electron transport chain means that NADH and FADH 2 cannot be oxidised, creating a lack of NAD+ and FAD, which are coenzymes for reactions in the Link reaction and the ... The electron transport chain is a series of four protein complexes, along with accessory electron carriers, e mbedded in the inner mitochondrial membrane of mitochondria.