Sugars and fats

Question 2

Cholesterol

Answer 2

Stabilises membrane
Structure prevents molecules from sliding past each other
Bind to fatty tails - causing them to pack more closely
More cholesterol, more rigid
Not present in bacterial cell membranes
Hydrophobic regions - enforces barrier to polar molecules

Question 3

Glycoproteins and glycolipids

Answer 3

Have polysaccharide chain attached to a protein or lipid on the membrane
Binding site for hormones and antibodies
Drug targets
Form hydrogen bonds with the surrounding water molecules