Question

Which of the following is most likely to cross a cell membrane by simple diffusion?

A. a protein
B. Oxygen
C. A potassium ion
D. Glucose

Answer 1

Glucose is most likely to cross a cell membrane by facilitated diffusion using carrier protein channels.

Step-by-step explanation:

Glucose is most likely to cross a cell membrane by facilitated diffusion. Facilitated diffusion is a type of passive transport that requires the help of specific protein channels in the membrane. Glucose molecules use these carrier protein channels to move down a concentration gradient, from an area of higher concentration to an area of lower concentration, without requiring energy.