[Campbell Biology P.177] What is the primary force holding the plasma membrane together, and... | Practice Question

What is the primary force holding the plasma membrane together, and how do most lipids and proteins typically move within it?

  • A: Covalent bonds; move rigidly.
  • B: Hydrophobic interactions; shift sideways.
  • C: Ionic bonds; flip-flop rapidly.
  • D: Hydrogen bonds; remain static.

Explanation

The plasma membrane is held together mainly by hydrophobic interactions, which are weaker than covalent bonds. Most lipids and some proteins can shift about sideways within the plane of the membrane, indicating fluidity.