Oxygen and carbon dioxide are able to pass through the plasma membrane of a cell because
A) they are both polar molecules.
B) both are lipid soluble.
C) they move through ion pores.
D) each binds to a transport protein that "pulls" it across the membrane.
E) they are small and nonpolar and readily pass between phospholipids.

Question

Quizplus · Accepted Answer

Oxygen and carbon dioxide are small, nonpolar molecules that can easily diffuse through the lipid bilayer of the plasma membrane without the need for transport proteins.

Oxygen and Carbon Dioxide Are Able to Pass Through the Plasma