- What causes the various fragments of DNA molecules to move at different rates?

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Which is more dangerous? AR-15s? Or atomic bombs ?? Why does my nighthawk carbon monoxide detector beep every 25 - 30 seconds? A fair coin is tossed 5 times. What is the probability of at least one head? Round to the nearest ten-thousandth.? Calculate the pH of a 0.725M solution of nitrous acid, HNO₂.? A 27.5-kg child is 22.5 m from an 85.5-kg adult. Where is the center of mass of this system? Take the origin at the position of the child.?