Answer must include: Same # protons, Different # neutrons, different molecular mass
15
2) Fill in the isotope table
See Mo's Key
20
3) Define and contrast the terms 'hydrophobic' and 'hydrophilic'
-Phobic: tending to repel or fail to mix with water. -Philic: having a tendency to mix w/, dissolve in, or be wetted by water (bonus: polar/nonpolar connection)
15
4) Define and contrast the difference between polar and non-polar molecules
Polar: A type of covalent bond between two atoms in which electrons are shared unequally. nonpolar: covalent bond w/ equal sharing of electrons
15
5) Label each of the following as polar or nonpolar: Water, Methanol, hydrogen cyanide, oxygen, propane
13) Explain how volume and area contribute to limits on cell size.
cells must be small in volume in order to maintain a large enough surface area-to-volume ratio and an ideal internal volume(vol increases faster than s.a).
15
14) In 3 minutes or less, label and define as many of the organelles on the cell worksheet being passed out
see key
20
15) Describe the plasma membrane (what makes it up, what is it's purposes?)
Answer must include: phospholipids, cholestrol, proteins Functions: control cell size, protect cell from external environ., control passage in&out of cell
10
16) Describe Chemiosmosis. Where do we see it?
energy from a proton gradient is used to make ATP. This gradient is sometimes called the proton-motive force