Cell membranes contain transmembrane proteins, which span the lipid bilayer with portions of the protein protruding into the aqueous external and internal cellular environments. The protein regions that span the membrane are ____, while the regions that extend from the membrane are ____.
A)acidic; basic
B)fatty acids; phosphate groups
C)hydrophobic; hydrophilic
D)hydrophilic; hydrophobic
E)polar; nonpolar

Question

Quizplus · Accepted Answer

The regions that span the membrane are hydrophobic, allowing them to interact with the fatty acid tails of the lipid bilayer. The regions that extend from the membrane are hydrophilic, allowing them to interact with the aqueous external and internal cellular environments.

Cell Membranes Contain Transmembrane Proteins, Which Span the Lipid Bilayer