What Holds Ras at the Inner Surface of the Plasma

Multiple Choice

What holds Ras at the inner surface of the plasma membrane?

A) weak interactions with the phospholipid head groups
B) weak interactions with integral membrane proteins
C) hydrophilic interactions of the Ras protein with the interior of the phospholipid bilayer
D) attachment to a lipid group that is embedded in the inner leaflet of the bilayer
E) attachment to a carbohydrate group that is embedded in the inner leaflet of the bilayer