Week 2

Question 1

Integral Membrane proteins

Answer 1

Embedded in the membrane

Span Membrane (Transmembrane)
Partway into membrane (monotopic protein)

Question 2

Peripheral Membrane

Answer 2

the surface of the membrane (inside or out)

Question 3

Lipid-Anchor Membranes

Answer 3

Attached to lipids in the bilayer

Protein may be attached to one or more lipids

Question 4

Three Carrier Proteins

Answer 4

Uniport
Symport
Antiport

Question 5

What is a Uniport Carrier Protein?

Answer 5

One molecule one direction

Question 6

What is a Symport Carrier Protein?

Answer 6

Two Molecules One Direction

Question 7

What is an Antiport Carrier Protein?

Answer 7

Two Molecules Opposite Directions

Question 8

Gated Channels

Answer 8

Voltage
Ligand
Mechanical

Question 9

What are Aquaporins

Answer 9

Water Channels

Question 10

Define Amphipathic

Answer 10

A molecule that contains both a hydrophobic and a hydrophilic end

Question 11

Transmembrane protein

Answer 11

proteins that span the membrane (both sides)

Question 12

Monotopic protein

Answer 12

partway into the membrane (one side)

Question 13

Leak Channel

Answer 13

not gated
diffuse along concentration gradient

Question 14

voltage-gated channel

Answer 14

Electrical Stimuli opens gate

usually ion specific: Na+, K+, Ca2+, Cl-

Question 15

Ligand Gated Channel

Answer 15

Allow ions to pass following binding of chemical messenger

Question 16

Mechanical Gated

Answer 16

Physical forces (Sound in ears)

Question 17

Primary Active transport

Answer 17

Direct, Requires ATP (Uniport)