Which Process Does Not Involve Molecules Moving Across Cell Membranes

Question

Which process does not involve molecules moving across cell membranes?
A) osmosis
B) facilitated diffusion
C) active transport
D) hydrogenation

Accepted Answer

Hydrogenation is a chemical process that involves adding hydrogen molecules to unsaturated fats to make them more saturated. It does not involve molecules moving across cell membranes. The other options (osmosis, facilitated diffusion, and active transport) all involve the movement of molecules across cell membranes.