 
 <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? <hau> Ka yi tunani kafin ka amsa tambayar da ke gaba. Hanyar wucewa: Sarkar jigilar lantarki (ETC) jerin hadaddun abubuwa ne waɗanda ke canja wurin electrons daga masu ba da lantarki zuwa masu karɓar electron ta hanyar halayen redox (duka ragewa da oxidation da ke faruwa a lokaci guda), kuma suna haɗa wannan canja wurin electron tare da canja wurin protons (H ions) a cikin membrane. Wannan yana haifar da gradient na proton wanda ke haifar da haɗin adenosine triphosphate (ATP), kwayar da ke adana makamashi ta hanyar sinadarai a cikin nau'i mai mahimmanci. Kwayoyin sarkar sun hada da peptides, enzymes (wanda sune sunadarai ko hadaddun sunadarai), da sauransu. Mai karɓar ƙarshe na electrons a cikin sarkar jigilar electron yayin numfashi na iska shine oxygen kwayoyin kodayake akwai masu karɓa daban-daban ban da oxygen kamar su sulfate a cikin numfashi na anaerobic.  Tambaya: Dangane da wannan nassi, menene mai karɓar electron na ƙarshe na tsarin jigilar electron? 