Lecture 2: Biological Membrane II

Question 1

Name the three transporters

Answer 1

uniporter, symporter, and antiporter

Question 2

Name the three membrane transport proteins

Answer 2

transporters, ATP powered pumps, and ion channels

Question 3

True or False: transport down the electrochemical gradient passive and does not require energy

Answer 3

True

Question 4

True or False: Transport against the electrochemical gradient requires energy

Answer 4

True

Question 5

Ion Channels

Answer 5

1. opening is regulated
2. only passive transport
3. saturable
4. selective for size and charge of ion.

Question 6

Transporters (GLUT1,GLUT2)

Answer 6

1. highly specific for molecule to be transported
2. saturable
3. undergo reversible change during transport of molecules
4. both active and passive transports

Question 7

__ and ___ molecules are transported across a membrane by transmembrane proteins

Answer 7

large, polar