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.
NAD+ is reduced to NADH in glycolysis, krebs cycle, B-oxidation, and a few other biochem pathways. NADH enters into the electron transport chain to ultimately phosphorylate 2.5 ATP molecules per NADH. You need NAD+ as a substrate to drive those above mentioned pathways. #1. Copy URL. Help others and be an Expert.