Question

Explain ETS and oxidative phosphorylation

Answer 1

Most of the free energy released during the oxidation of glucose to CO2 is retained in the reduced coenzymes NADH and FADH2 generated during glycolysis and the found acid cycle. During respiration, electrons are released from NADH and FADH2 and eventually are transferred to O2, forming H20 according to the following overall reactions.

NADH + H + 1/2 O2 ===> NAD + H2O

FADH2 + 1/2 O2 ===> FAD + H2O