u1 final2

Question 1

iodine

Answer 1

starch - yellow to dark blue/black

Question 2

biuret

Answer 2

protein - blue to violet

Question 3

benedicts

Answer 3

glucose - blue to rusty reddish brown

Question 4

selective permeability

Answer 4

some molecules can pass thru while others cant

Question 5

homeostasis

Answer 5

cells respond to changing environment trying to maintain a STEADY STATE –> molecules enter and leave cell

Question 6

cholesterol in FMM

Answer 6

provide structure to the fliud membrane and keeps it together
- STEROL embedded prevents fatty acid chains

Question 7

membrane proteins in FMM +types

Answer 7

molecules pass thru proteins instead of hydrophobic inner layer (like tunnel)
- transport (channel)
- receptor
- marker

Question 8

transport proteins

Answer 8

tube-like shape to form a tunnel inside cell membrane, only allows certain molecules to pass

Question 9

receptor proteins

Answer 9

communicate info from outside to inside the cell
- when a molecule of the same shape fits into the receptor (that kinda sticks outside the membrane) it causes a response inside the cell

Question 10

marker proteins

Answer 10

proteins with carb chain attached which acts as an identifier and helps to distinguish bw diff proteins (glycoproteins)
- e.g. blood type marker proteins/antigens

Question 11

types of passive transport

Answer 11

simple diffusion, osmosis, facilitated diffusion

Question 12

types of active transport

Answer 12

protein pumps, endocytosis, exocytosis

Question 13

simple diffusion

Answer 13

molecules move from high to low concentration trying to create an EQUILIBRIUM where the outside=inside concentration
- e.g. oxygen, co2

Question 14

osmosis

Answer 14

simple diffusion of JUST water (move to solution with higher [solute])

Question 15

3 types of solution

Answer 15

hypotonic - inside of cell has higher concen. than outside, water diffuses IN and cell swells and bursts
hypertonic - outside of cell has higher conc than inside, water diffuses OUT and cell shrivels
isotonic - solute conc inside = solute conc outside, no net movement of water, no change

Question 16

facilitated diffusion

Answer 16

some molecule too large/polar to pass thru, instead move down their concentration gradient using transport proteins

Question 17

protein pumps

Answer 17

protein in the nucleus that uses atp to change its configuration to force molecules to move from low to high concerntation

Question 18

bulk transport

Answer 18

formation of vesicles from the pinching off of the cell membrane

Question 19

endocytosis

Answer 19

brings thing into the cell
- phagocytosis: movement of larger ffood particles across the membrane
- pinocytosis: taking in of smaller dissolved ions/molecules

Question 20

exocytosis

Answer 20

gets rid of things from the cell