Passive molecular diffusion occurs when ____.
A)the energy of ATP is added
B)random collisions between molecules occurs
C)there are variations in molecular sizes
D)enzymes catalyze their movement
E)vesicles break off from the membrane

Question

Quizplus · Accepted Answer

Passive molecular diffusion occurs when small, non-polar molecules move through the phospholipid bilayer of a membrane from a region of high concentration to a region of low concentration due to random collisions between molecules. Energy from ATP, variations in molecular sizes, enzyme catalysis, and vesicle formation are not required for simple diffusion to occur.

Passive Molecular Diffusion Occurs When ____