Answer: Are loosely bound to the surface.
- A Span the whole lipid bilayer
- B Are permanently embedded in it
- C Form channels for transport
- D Are loosely bound to the surface
Correct answer: D. Are loosely bound to the surface
Explanation: Peripheral proteins lie loosely on the membrane surface and are easily removed; integral proteins are embedded in, or span, the lipid bilayer.
Animal cell structure with major organelles labeled. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.