Multiple choice

The spontaneous movement of gases across a selectively permeable membrane takes place by

  1. diffusion

  2. permeation

  3. plasmolysis

  4. membrane biogenesis

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Option (1) is correct. Diffusion across the membrane is the net movement of molecules in a fluid from the region of higher concentration to the region of lower concentration. This is because it decreases the amount of free energy. Diffusion is a spontaneous process.