5.1 The Structure And Function Of Membranes

Question 1

Compartmentalisation

Answer 1

Formation of separate membrane-bound areas in a cell

Question 2

Intrinsic protein

Answer 2

Transmembrane protein, contains hydrophobic R-groups on external surface keeping it in place

Question 3

Channel protein

Answer 3

Intrinsic protein, allows passive movement of polar molecules down a concentration gradient

Question 4

Carrier proteins

Answer 4

Intrinsic protein, plays a role in active and passive transport

Question 5

Cell signalling

Answer 5

Chemical binds to receptor, allowing direct response or cascade of events inside cell

Question 6

Extrinsic protein

Answer 6

Present in one side of the bilayer. Hydrophilic R-groups on outer surfaces