Electron Transport Chain When NADH delivers high energy electrons to the first carrier of the electron transport chain, enough energy is captured by the time the electrons are received by O2 to permit the production of three ATP molecules.
67 days of darkness. Even though residents of Barrow, the northernmost town in Alaska, won't see the sun for 67 days come winter, they enjoy the midnight sun all summer-over 80 days of uninterrupted daylight.
In Alaska, the sun travels in a slanting 360 degree circle in the sky, so even if it's below the horizon, it's barely below it for a long period. This means that even though the sun isn't visible, we still receive very bright twilight that can last for hours or until the sun rises again.