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.
Transcript: Hi, this is Dr. B. Let's do the Lewis structure for CH2F2: difluoromethane. On the periodic table, Carbon is in group 4, it has 4 valence electrons. Hydrogen, group 1, but we have 2 Hydrogens.Fluorine, 7 valence electrons, we have 2 of those as well, for a total of 20 valence electrons.We'll put the Carbon at the center, and then Hydrogens always go on the outside.luorine needs 8, this Fluorine has 8 and this Fluorine has 8. And then Carbon, in the center, needs 8, and it has 8. So we've used all the valence electrons. Everything has full outer shells. That is the Lewis structure for CH2F2. This is Dr. B., and thanks for watching.