Which of the following substances must travel across a membrane via facilitated diffusion?
A) carbon dioxide
B) water
C) oxygen
D) fat-soluble vitamins
E) glucose

Question

Quizplus · Accepted Answer

Glucose is a polar molecule and too large to diffuse across the lipid bilayer of the membrane. Therefore, it must be transported via facilitated diffusion through transport proteins called glucose transporters (GLUTs).

Which of the Following Substances Must Travel Across a Membrane