The two types are, aerobic where the final electron acceptor of the Electron Transport Chain is oxygen, and anaerobic, where the final electron acceptor of the Electron Transport Chain is a molecule aside from oxygen.
Answer: Ribose is synthesized from glucose and other monosaccharide molecules in living cells by a process known as pentose phosphate pathway. The pentose phosphate pathway is a series of chemical reactions taking place in the cytosol of cells.