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IB Biology SL 3.1.1 Gas Exchange and Respiration Question Bank

Practise IB Biology SL 3.1.1 using exact SL questions distinguishing ventilation, gas exchange, diffusion and cellular respiration.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Distinguish ventilation, gas exchange and cell respiration in an aerobic organism.
  • Explain how oxygen uptake and carbon dioxide release occur down concentration gradients.
  • Use a gas-exchange example to connect diffusion with the demands of aerobic respiration.

B3.1.1—Gas exchange as vital function question 1

[Maximum number: 3]

Outline the process of gas exchange necessary for aerobic respiration in a unicellular eukaryotic organism.

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