UK GCSE · Biology
Organisation, Digestion and Circulation
17 practice questions, each with the answer and an explanation.
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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 17 questions
- Which enzyme breaks down starch into sugars in the mouth?
- Why does an enzyme stop working at a high temperature?
- Bile is made in the liver. What is its role in digestion?
- Which food test gives a brick-red precipitate when heated with Benedict's solution?
- What is the function of the villi in the small intestine?
- Which blood vessel carries blood away from the heart to the body?
- Which component of blood carries oxygen around the body?
- Why do arteries have thick elastic walls?
- Which chamber of the heart pumps blood to the lungs?
- A patient has a narrowed coronary artery. Which explanation best links this to the heart muscle?
- Which gas exchange surface in the lungs has a thin wall and a good blood supply?
- Which change occurs in the chest when a person breathes in?
- Smoking damages the cilia in the airways. What is the most likely result?
- Which of these is a non-communicable disease?
- In a plant, which tissue transports sucrose from the leaves to the roots?
- What is transpiration?
- On a hot, windy day the rate of transpiration increases. Which explanation is correct?
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