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CAIE IGCSE Biology 12.2.3 Balanced Aerobic Respiration Equation

Practise writing and checking the balanced symbol equation for aerobic respiration, including every formula and coefficient.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • state C6H12O6 + 6O2 -> 6CO2 + 6H2O with correct chemical formulae
  • award separate attention to correct molecules and the 1:6:6:6 balancing ratio
  • use coefficients to calculate oxygen, carbon-dioxide or water molecule numbers

12.2.3—Balanced chemical equation for aerobic question 1

[Maximum number: 2]

Fig. 2.1 shows a cross-section of a human heart.

Fig. 2.1

Fig. 2.1

Fig. 2.3 shows how the body uses aerobic and anaerobic respiration during the first 120 seconds of vigorous physical activity. Between 0 and 20 seconds, the body also uses stored energy.
percentage of energy released

Fig. 2.3

Fig. 2.3

State the balanced chemical equation for aerobic respiration.

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