diff options
Diffstat (limited to 'Homework/biol1010/12-Sep.org')
| -rw-r--r-- | Homework/biol1010/12-Sep.org | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/Homework/biol1010/12-Sep.org b/Homework/biol1010/12-Sep.org new file mode 100644 index 0000000..4bfc1e6 --- /dev/null +++ b/Homework/biol1010/12-Sep.org @@ -0,0 +1,48 @@ +* Nucleic Acids +Elements C, H, O, N, P + +Store genetic information + +Examples: DNA, RNA + + +* Cells +All have the following features: cell membrane, cytosol, DNA, ribosomes + +| comparison | prokaryotic | eukaryotic | +| nucleus and other membrane-bound organelles present | no | yes | +| size | smaller | larger | +| cell structure | unicellular | multi/uni-cellular | +| examples | bacteria | plants,animals,etc. | + +** Endomembrane System (Organelles with membranes) +nucleus, endoplasmic reticulum, golgi apparatus, lysosomes, vesicles, vacuoles, cell membrane + +** Phospholipid molecule +hydrophilic head, two hydrophobic tails + +** Cell membrane +Components: phospolipid bilayer, proteins + +Feature: semipermeable + +** Cell transport processes can be passive or active +Passive processes: + ++ Do not require the cell to expend energy ++ Net movement from high to low concentration; "with" or "down" the gradient ("difference in concentation") + +| Passive Transport Process | Description | Net Direction of Molecule Movement | Molecules transported? | +| Diffusion | molecules spread evenly into space | High -> low [H] -> [L] | O_2, CO_2 | +| Facilitated Diffusion | molecule movemement is assisted by proteins | "" | | +| Osmosis | movement of water across a selectively permeable membrane | | | +| | from high concenctration of water to low concentration | | H_2O | + +** Solute +concentration in solution: + +| hypertonic | greater solute concreation | +| isotonic | equal [solute] | +| hypotonic | lower [solute] | + + |