Monday, October 26, 2009
Mon-Day 1
Bio 3/6- I'll upload today's notes when I get home to my tablet pc :)
We discussed the "S" phase of interphase and showed how the DNA that makes up a chromosome can exactly replicate itself. Each double-helix DNA molecule "unzips" with the help of an enzyme that quickly "breaks" the "hydrogen bonds" that keep the two chains of complementary nucleotides attracted to each other. Then, the free-floating nucleotide building blocks in the nucleus that are randomly moving around eventually are attracted to and paired with their exposed complementary base partners on each of the two unzipped strands.
The result is a "double-chromatid" chromosome that will eventually pulled apart into TWO identical chromosomes when the cell undergoes mitosis and cytokinesis.
AP Chem- we reviewed some earlier definitions and then did a couple of First Law of Thermo problems, noting the meaning, value, and signs of q and w. We also associated ENTHALPY, H, with the heat gained or lost by the system at CONSTANT pressure.
We further associated H with potential energy as the result of the stability (number and strength of bonds or attractions) of the system.
The result is a "double-chromatid" chromosome that will eventually pulled apart into TWO identical chromosomes when the cell undergoes mitosis and cytokinesis.
AP Chem- we reviewed some earlier definitions and then did a couple of First Law of Thermo problems, noting the meaning, value, and signs of q and w. We also associated ENTHALPY, H, with the heat gained or lost by the system at CONSTANT pressure.
We further associated H with potential energy as the result of the stability (number and strength of bonds or attractions) of the system.
# posted by C @ 1:16 PM 
