Question

5 multiple choice 1 point how would a small, nonpolar molecule likely diffuse across a cell membrane? open channel - mediated facilitated diffusion substrate and carrier - mediated facilitated diffusion simple diffusion active transport

Explanation:

Small, non - polar molecules can pass through the lipid - bilayer of the cell membrane easily due to their hydrophobic nature and the non - polar environment of the membrane interior. They do not require a channel or carrier protein (unlike facilitated diffusion) and do not need energy input (unlike active transport). Simple diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration across a semi - permeable membrane without the help of transport proteins.

Answer:

C. simple diffusion