Active transport moves substances

  1. only water through a membrane
  2. against a concentration gradient using energy from respiration
  3. through the cell wall only
  4. down a concentration gradient without energy
Answer

B) against a concentration gradient using energy from respiration

Definition of active transport. O Level Biology · Topic 3 Movement into and out of Cells · 3.2 Active transport

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