Which of the following would be likely to move through a plasma membrane by simple diffusion?

Question

Quizplus · Accepted Answer

Water, carbon dioxide, and oxygen are small molecules that can dissolve in the lipid bilayer of the plasma membrane and move through it by simple diffusion.

Option B is incorrect because large molecules like polysaccharides, large protein molecules, and low-density lipoprotein particles are unable to freely pass through the plasma membrane by simple diffusion.

Option C is incorrect because bacteria and yeast are much larger than simple molecules like water, carbon dioxide, and oxygen, so they cannot move through the plasma membrane by simple diffusion.

Option D is incorrect because ions like sodium and hydrogen require protein channels or transporters to cross the plasma membrane, while sugars and amino acids are also too large to move through by simple diffusion.

Which of the Following Would Be Likely to Move Through