What are the connections between water density and temperature?
(See 1.31) Ice is less dense than water, so it floats atop of liquid water. Liquid water itself sinks or rises depending on its density which varies with temperature. The most dense liquid water will be at the bottom of a container (graduated cylinder, lake, whatever) and its temperature will be at ~4 degrees C (we measured 5.5 degrees in our expt). 1.33 How do the DNA bases fit together? This problem is part of the Expt 1 problem set. Be sure to do it in lab and check your answer. 1.34 How does hydrogen bonding affect the thermal stability of DNA? Hydrogen bonds hold the DNA helix together. It takes energy to disrupt the H-bonds – added heat will provide enough energy to overcome the H-bond attraction between the DNA bases. The more H-bonds, the greater the thermal stability will be (the more heat required to disrupt the H-bonds). From Investigate This 1.33, we know that 3 H-bonds form per C-G pair and 2 H-bonds form per A-T pair. So if the C-G to A-T ratio is higher, thermal stabilit
