The three golden lions on a red background, symbolising England, occupy the first and fourth quarters. The Arms of Scotland, a red lion rearing on its hind legs inside a red border, are in the second quarter, and the Arms of Ireland's golden harp with silver strings on a blue background-are in the third quarter.
Once it is reduced to QH2, ubiquinone delivers its electrons to the next complex in the electron transport chain. Q receives the electrons derived from NADH from complex I and the electrons derived from FADH2 from complex II, including succinate dehydrogenase. This enzyme and FADH2 form a small complex that delivers electrons directly to the electron transport chain, bypassing the first complex.
The NAD + molecule is used to accept electrons (becomes reduced) in several chemical reactions in glycolysis and the Krebs cycle. NAD + accepts a hydrogen ion (H +) and two electrons (2e â), as it becomes reduced to NADH + H + .The NADH moves to the electron transport chain and donates a pair of electrons (becomes oxidized) to the first compound in the chain.he NAD + molecule is used to accept electrons (becomes reduced) in several chemical reactions in glycolysis and the Krebs cycle. NAD + accepts a hydrogen ion (H +) and two electrons (2e â), as it becomes reduced to NADH + H + .