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CAIE IGCSE Biology 3.1.2 Energy for Diffusion Comes Questions

Practise linking the kinetic energy of randomly moving molecules and ions to diffusion, while keeping the concentration gradient separate from the source of particle motion.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • state that the energy needed for diffusion is kinetic energy

CAIE IGCSE Biology 3.1.2 Energy for Diffusion Comes Questions question 1

[Maximum number: 1]

Fig. 1.1 shows the movement of particles through an epithelial cell in the small intestine.

Fig. 1.1

Fig. 1.1

In Fig. 1.1, arrow P represents the diffusion of oxygen molecules.

State the type of energy needed for diffusion.

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