Carbon dioxide is a small molecule that moves through the phospholipid bilayer with its concentration gradient by:
A) facilitated diffusion.
B) primary active transport.
C) osmosis.
D) simple diffusion.

Question

Quizplus · Accepted Answer

Carbon dioxide is a nonpolar molecule that can easily pass through the phospholipid bilayer without the need for transport proteins, which is characteristic of simple diffusion.

Carbon Dioxide Is a Small Molecule That Moves Through the Phospholipid