Which of the following is true of integral membrane proteins?
A) They lack tertiary structure.
B) They are loosely bound to the surface of the bilayer.
C) They are usually transmembrane proteins.
D) They are not mobile within the bilayer.
E) They serve only a structural role in membranes.

Question

Quizplus · Accepted Answer

Integral membrane proteins are usually transmembrane proteins, which means that they span the entire lipid bilayer of the membrane and have both hydrophobic and hydrophilic regions.

Answer: D
 Integral membrane proteins are embedded within the lipid bilayer and can move around laterally within the bilayer, although their movement may be restricted depending on the specific protein and the membrane environment. Choices A, B, and E are all false statements.

Which of the Following Is True of Integral Membrane Proteins