Question

the metabolism of glucose requires the presence of what as the final electron acceptor

Answer 1

The metabolism of glucose requires the presence of OXYGEN as the final electron acceptor.

DETAILED EXPLANATION:

Metabolism of glucose is carried out by a process known as Glycolysis. in this process, 1 molecule of glucose is converted into two pyruvic acids., but here NAD is also used at one step and produce NADH(a potent electron donor) that can be converted into ATP currency, for that electron transport chain (ETC) is required and in ETC the final electron acceptor is oxygen. Pyruvic acid is converted into acetyl co and produces 1 NADH, this acetyl Co-A further goes into the TCA cycle and produces 3 NADH, 1 FADH2.  The complete metabolism of glucose occurs by the oxidation of NADH and FADH2 into ATP which is done by the ETC cycle where Oxygen play the role of final electron acceptor to get reduce into 1 H2O molecule.