Question

facilitated diffusion is used to transport
multiple choice
lipids and o₂.
sugars and amino acids.
amino acids and lipids.
co₂ and o₂.
o₂ and sugars.

Explanation:

Facilitated diffusion uses transport proteins to move substances across the cell - membrane down their concentration gradient. Small, non - polar molecules like lipids, $O_2$, and $CO_2$ can pass through the lipid bilayer by simple diffusion. However, polar molecules such as sugars and amino acids require transport proteins for diffusion across the membrane, which is facilitated diffusion.

Answer:

B. sugars and amino acids