Question

What characteristic makes osmosis different from diffusion?

Question options:



A. Osmosis occurs through a semipermeable membrane. Diffusion occurs through a permeable membrane.



B. Net movement in osmosis is from areas of higher concentration to areas of lower concentration. Net movement in diffusion occurs from areas of higher concentration to areas of lower concentration.



C. Osmosis requires facilitation by an energy-carrying molecule, such as ATP. Diffusion requires no additional energy to move molecules across the concentration gradient.



D. Osmosis is used for gases, such as oxygen and carbon dioxide. Diffusion is used for water that contains salt or sugar molecules

Answer 1

A. Osmosis has to occur through a semi-permeable membrane whereas diffusion can occur through any concentration gradient.

B is incorrect because net movement of osmosis is from area of low concentration to area of high concentration.

C is incorrect because both diffusion and osmosis is a form of passive transport

D is incorrect because the descriptions of osmosis and diffusion are swapped