Diffusion is the net movement of particles from

  1. a lower concentration to a higher concentration
  2. a dilute solution to a concentrated one through a membrane only
  3. a higher concentration to a lower concentration
  4. cell to cell using energy from respiration
Answer

C) a higher concentration to a lower concentration

Diffusion is down a concentration gradient. O Level Biology · Topic 3 Movement into and out of Cells · 3.1 Diffusion and osmosis

Biology MCQ · More O Level Biology: Movement into and out of Cells MCQs · Practise