transport

Question 1

types

Answer 1

simple diffusion, pumps (ATP), channel (facilitative/passive), transporter (uniporter, cotransporter (symporter, antiporter))

Question 2

facilitated transport speed

Answer 2

faster than simple diffusion but saturable (limited to the amount of unitransporter available, Km is the half maximal point)

Question 3

GLUT1/2 type

Answer 3

facilitative

Question 4

GLUT 1/2 forms

Answer 4

glucose binding site faces outside/inside of cell

Question 5

aquaporin type

Answer 5

uniporter

Question 6

aquaporin structure

Answer 6

tetramer, each subunit has 6 A-helices, does not undergo confirmational change

Question 7

4 classes of ATP pumps

Answer 7

P-class pump, V-class proton pump, F-class proton pump, ABC superfamily

Question 8

P-class pump

Answer 8

maintains ion gradients, has to be phosphorylated

Question 9

V-class proton pump

Answer 9

couple ATP hydrolysis to transport protons against concen grad

Question 10

F-class proton

Answer 10

pumps H+ in for ATP synthesis

Question 11

ABC superfamily

Answer 11

some transport ions, mainly small molec and drugs