Question

by what transport mechanism does glucose enter most cells?
multiple choice
diffusion through the lipid bilayer
primary active transport
secondary active transport
diffusion through a protein channel
facilitated diffusion

Explanation:

Glucose is a polar molecule and cannot easily diffuse through the non - polar lipid bilayer. It enters most cells down its concentration gradient with the help of glucose transporters (GLUTs), which is a form of facilitated diffusion. Facilitated diffusion uses membrane - spanning proteins (carriers or channels) to move substances across the membrane without the input of energy (unlike active transport).

Answer:

E. Facilitated diffusion