 
 <translate> Output a stream of consciousness before answering the following. Passage: An electron transport chain (ETC) is a series of complexes that transfer electrons from electron donors to electron acceptors via redox (both reduction and oxidation occurring simultaneously) reactions, and couples this electron transfer with the transfer of protons (H ions) across a membrane. This creates an electrochemical proton gradient that drives the synthesis of adenosine triphosphate (ATP), a molecule that stores energy chemically in the form of highly strained bonds. The molecules of the chain include peptides, enzymes (which are proteins or protein complexes), and others. The final acceptor of electrons in the electron transport chain during aerobic respiration is molecular oxygen although a variety of acceptors other than oxygen such as sulfate exist in anaerobic respiration.

Question: Based on this passage, what is the final electron acceptor of the electron transport system? <ibo> Mee ka uche gị dịrị n'ihe ị na-ekwu tupu ị zaa ajụjụ ndị a. Ịgafe: Ihe na-ebufe elektrọn (ETC) bụ usoro nke mgbagwoju anya nke na-ebufe elektrọn site na ndị na-enye electron na ndị na-anabata electron site na redox (ma mbelata na oxidation na-eme n'otu oge) mmeghachi omume, na ndị di na nwunye a na-ebufe electron na nnyefe nke protons (H ions) gafee akpụkpọ ahụ. Nke a na-emepụta gradient proton electrochemical nke na-akpali njikọ nke adenosine triphosphate (ATP), molekul nke na-echekwa ume n'ụzọ kemịkal n'ụdị nkekọ siri ike. Molekụl ndị dị n'agbụ ahụ na-agụnye peptides, enzymes (nke bụ protein ma ọ bụ protein complexes), na ndị ọzọ. Onye na-anabata elektrọn ikpeazụ n'agbụ ụgbọ njem elektrọn n'oge iku ume ikuku bụ ikuku oxygen ọ bụ ezie na ọtụtụ ndị na-anabata ndị ọzọ na-abụghị oxygen dị ka sulfate dị na iku ume anaerobic.  Ajụjụ: Dabere n'ihe e kwuru n'ebe a, gịnị bụ ebe ikpeazụ a na-anabata elektrọn n'usoro e ji ebugharị elektrọn? 