Question

multiple choice question
which of the following would move across the cell membrane by facilitated diffusion?
glucose
proteins
carbon dioxide

Explanation:

Facilitated diffusion is a type of passive transport that requires the help of transport proteins. Glucose is a polar molecule and is too large to pass through the lipid - bilayer of the cell membrane by simple diffusion. It moves across the cell membrane with the help of glucose transporters (a type of transport protein), which is an example of facilitated diffusion. Carbon dioxide is a small non - polar molecule that can pass through the lipid bilayer by simple diffusion. Proteins are large molecules and are not typically transported across the cell membrane by facilitated diffusion (they may be transported by other mechanisms like endocytosis/exocytosis depending on the context).

Answer:

glucose