The hydrophilic regions of a membrane protein are most likely to be found
A) only in muscle cell membranes.
B) exposed on the surface of the cell membrane.
C) attached to carbohydrates and facing the interior of a cell.
D) associated with the fatty acid region of the lipids.
E) in the interior of the membrane.

Question

Quizplus · Accepted Answer

Hydrophilic regions of membrane proteins are likely to be exposed on the surface of the cell membrane where they can interact with the aqueous environment outside and inside the cell. This is because hydrophilic (water-loving) regions are attracted to water molecules, which are found in abundance in the extracellular fluid and cytosol.

The Hydrophilic Regions of a Membrane Protein Are Most Likely