Question

what does facilitated diffusion require? multiple choice enzymes carrier proteins lipid carriers carbohydrate carriers lipid or carbohydrate carriers

Explanation:

Facilitated diffusion is a passive - transport process. It requires carrier proteins to move substances across the cell membrane down their concentration gradient. Enzymes are for catalyzing chemical reactions, and lipid or carbohydrate carriers are not involved in facilitated diffusion in the way carrier proteins are.

Answer:

B. Carrier proteins