Part E Water can exist in three different states of matter: solid, liquid, and gas. The water molecules are the same in each sta
te, but the distance between them changes as water changes state. Space your four molecules evenly on one sheet of paper. Now place the second sheet of paper next to the first sheet, so the long edges of the sheets are touching. Space your four molecules evenly over both sheets of paper. Compare the two models. Does this demonstration show how the distance between water molecules can change? Were the molecules more tightly-packed on one or two sheets of paper? Explain.
No, the demonstration did not show the distance between water molecules change because the four molecules are evenly spaced on both the paper sheet. If we want to demonstration the distance between water molecules of different states we have to make the diagram of water molecules of solid having less space as compared to liquid while liquid has less space as compared to gas state of water. Yes, the molecules were more tightly-packed on both sheets of paper which shows that more force of attraction is present between them.
They unzip the double helix into single strands during replication. The unzipping occurs at regions called origins where replication is initiated. The protein breaks the hydrogen bonds (using energy from ATP) between the complimentary bases of the strands hence forming a replication fork.
