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 the winter, the Interior gets about 4, maybe 4 1/2 hours of daylight. Barrow bids farewell to the sun entirely for about 6 weeks, and places like Anchorage or Juneau have around 6 or 7 hours of daylight. Again, for Barrow, though the sun technically never rises, there's still light around the edges of the horizon, so it's not pitch black 24/7.