CAIE IGCSE Biology 3.3.3 Protein Carriers Move Molecules or Questions

Practise explaining how specific membrane carrier proteins bind and move molecules or ions during active transport, linking movement against a gradient to respiration energy.

Exam points

identify a labelled membrane component that transports mineral ions as a carrier protein
state that carrier proteins move molecules or ions across a cell membrane during active transport
link carrier-mediated movement against a concentration gradient to energy released by respiration

[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. 3.2

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

All question bank results loaded

CAIE IGCSE Biology 3.3.3 Protein Carriers Move Molecules or Questions question 1