Question

What 2 biomolecules make up the cell membrane?

Answer 1

Answer:

Cell membranes: Lipids, protein and carbydrates

Diffusion is the movement of materials across a membrane of greater concentration gradient to lower concentration gradient.

Osmosis is the movement of a solvent (usually water) across a selectively permeable membrane.

Active transport is the movement of materials against concentration gradient at the expense of energy.