 
 <translate> Lati dahun ibeere ti o wa loke, gbolohun ti o yẹ ni: Olumulo ikẹhin ti awọn elekitironi ninu ẹwọn gbigbe elekitironi lakoko atẹgun afẹfẹ jẹ atẹgun molikula botilẹjẹpe ọpọlọpọ awọn olumulo miiran ju atẹgun bii sulfate wa ninu atẹgun anaerobic. Ìdáhùn náà ni pé: ó jẹ́ afẹ́fẹ́ oxygen. <hau> Don amsa tambayar da ke sama, jumlar da ta dace ita ce: Mai karɓar ƙarshe na electrons a cikin sarkar jigilar electron yayin numfashi na iska shine oxygen kwayoyin kodayake akwai wasu masu karɓa daban-daban ban da oxygen kamar su sulfate a cikin numfashi na anaerobic. Amsar ita ce: iskar oxygen. 