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CAIE IGCSE Biology 3.3 Active Transport Questions

Practise recognising active transport from movement against a concentration gradient, then explain the roles of membrane carriers and energy released by respiration.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • recognise movement from lower to higher concentration across a membrane as against the gradient
  • state that active transport uses energy released by respiration and occurs in living cells
  • apply the process to mineral-ion uptake by root hairs and other carrier-mediated membrane transport

Covered syllabus points

3.3.1—Active transport as the movement3.3.2—Importance of active transport3.3.3—Protein carriers move molecules or

Question 1

[Maximum number: 2]

Fig. 3.1 is a diagram of the junction between two neurones in a healthy person.
Fig. 3.2 is a diagram of the junction between the same two neurones in a person who has Parkinson's disease. This disease affects the nervous system.

Fig. 3.1

Fig. 3.1

Fig. 3.2

Fig. 3.2

Cell membranes also contain protein carriers. Describe the role of protein carriers.

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