CourseCourseConceptConceptDocumentDocument

CAIE IGCSE Biology 12.2 Aerobic Respiration Questions

Practise aerobic-respiration questions on oxygen use, glucose breakdown, energy release, word equations and balanced symbol-equation coefficients.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • describe aerobic respiration as oxygen-dependent chemical reactions that release energy from nutrients
  • explain how oxygen supply or mitochondrial function limits aerobic energy release in cells
  • write glucose + oxygen → carbon dioxide + water as the aerobic respiration word equation
  • identify glucose and oxygen as reactants and carbon dioxide and water as products
  • state C6H12O6 + 6O2 → 6CO2 + 6H2O with correct formulae and direction
  • balance the aerobic respiration equation with the 1:6:6:6 coefficient ratio
  • use balanced-equation coefficients to calculate oxygen, carbon-dioxide or water molecule numbers

Covered syllabus points

12.2.1—Aerobic respiration as the chemical12.2.2—Word equation for aerobic respiration12.2.3—Balanced chemical equation for aerobic

Question 1

[Maximum number: 1]

Some students were studying the activity of yeast. They made a fact file, as shown in Fig. 1.1.

Fig. 1.1

Fig. 1.1

State the process that occurs in mitochondria to provide energy for yeast cells.

Question 2

[Maximum number: 1]

The substances listed are associated with aerobic respiration.
1 carbon dioxide
2 glucose
3 oxygen
4 water
Which substances are the products of aerobic respiration?

A

1 and 3

B

1 and 4

C

2 and 3

D

3 and 4

Question 3

[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.

All question bank results loaded