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CAIE IGCSE Biology 12.2.1 Defining Aerobic Respiration

Practise describing aerobic respiration as oxygen-dependent reactions in cells that break down nutrient molecules and release energy.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • describe aerobic respiration as chemical reactions in cells that use oxygen
  • link breakdown of glucose or other nutrients to the release of usable energy
  • explain why blocked mitochondria or inadequate oxygen reduces energy release in cells

12.2.1—Aerobic respiration as the chemical 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

Carbon dioxide molecules also move by diffusion.

State the name of the process in human cells that produces carbon dioxide.

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