Which molecules cross the bilayer most easily by simple diffusion?

  1. Glucose
  2. Ions such as Na⁺
  3. Proteins
  4. Small non-polar molecules such as oxygen
Answer

D) Small non-polar molecules such as oxygen

Non-polar molecules dissolve in the bilayer. AS & A Level Biology · Topic 4 Cell Membranes and Transport · 4.1 Fluid mosaic membranes

Biology MCQ · More A Level Biology: Cell membranes and transport MCQs · Practise