Free Gas exchange questions for IGCSE Biology (0610), part of Disease, gas exchange & respiration. Each question has the answer and the marking points an examiner would look for.
Generate a full Gas Exchange worksheet →All Disease, gas exchange & respiration questionsWhich row describes breathing in (inspiration)?
| external intercostal muscles | diaphragm | pressure in the thorax | |
|---|---|---|---|
| A | relax | contracts and flattens | decreases |
| B | contract | contracts and flattens | decreases |
| C | contract | contracts and flattens | increases |
| D | contract | relaxes and domes upwards | increases |
Answer: B
What is the function of goblet cells in the trachea?
Answer: A
Which feature of alveoli increases the rate of gas exchange?
Answer: C
Yeast can respire aerobically or anaerobically.
Write the word equation for anaerobic respiration in yeast.
Give one use of this reaction in industry.
Describe how you would investigate the effect of temperature on the rate of respiration of yeast.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | glucose → ethanol + carbon dioxide glucose → ethanol + carbon dioxide B2 | 2 |
| (b) | bread / alcohol production bread-making (CO₂ raises dough) or brewing (ethanol) B1 | 1 |
| (c) | water baths; count bubbles/measure gas; same conditions yeast and sugar solution in water baths at different temperatures B1 measure rate by counting bubbles / volume of CO₂ per minute B1 keep concentration and volume constant B1 | 3 |
Respiration releases energy in all living cells.
Write the word equation for aerobic respiration.
State three uses of the energy released by respiration in humans.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | glucose + oxygen → carbon dioxide + water glucose + oxygen B1 → carbon dioxide + water B1 | 2 |
| (b) | muscle contraction; protein synthesis; cell division; active transport; growth; nerve impulses; body temperature Any 3 of: any three: muscle contraction; protein synthesis; cell division; active transport; growth; passage of nerve impulses; maintenance of body temperature B3 | 3 |
The lungs are protected from pathogens and particles.
Describe the role of mucus and cilia.
Explain why the trachea has rings of cartilage.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | mucus traps; cilia sweep up mucus traps pathogens and dust B1 cilia beat to move the mucus up to the throat B1 | 2 |
| (b) | keeps airway open to keep the airway open during breathing B1 | 1 |
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Meet Riyaz →Original Cambridge-style practice questions written for mentorriyaz.in. These are not Cambridge past paper questions, and this site is not affiliated with or endorsed by Cambridge University Press & Assessment. Updated 2026-11-04. Paper generator · mentorriyaz.in