Question

multiple select question select all that apply which molecule(s) should be able to pass directly through the cell membrane? oxygen proteins carbon dioxide amino acids

Explanation:

Small non - polar molecules can pass directly through the cell membrane by simple diffusion. Oxygen is a small non - polar molecule, and carbon dioxide is also small and non - polar. Amino acids are polar and require transport proteins to cross the membrane, and proteins are large macromolecules that cannot pass directly through the cell membrane by simple diffusion.

Answer:

B. Carbon dioxide, D. Oxygen