The processes that use the mechanisms are: Cellular respiration â ATP is generated by oxidation of organic molecules, the passage of electrons down an electron transport chain, and chemiosmosis. The final electron acceptor is almost always inorganic. Aerobic â the final electron acceptor is O 2.
The Sumerians lived in Mesopotamia around 4000 BC. Mesopotamia or the Fertile Crescent was a region in the Middle East between the Tigris and Euphrates rivers, in the territory of modern Iraq, Iran and Syria.
The Sumerians were Polytheists. Among the Ziggurats of the Sumerians, the Ziggurat built at Nipur for their chief god âEnlilâ was the biggest. He was the deity of the sacred city Nipur. He was also worshipped as the earth god and air god. Another Ziggurat was built at Ur for âNannarâ, the man god.