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Sample exam questions - exchange and transport in animals - Edexcel Practical questions

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

Part of Biology (Single Science)Exchange and transport in animals

Practical questions

You will complete ten required practical activities if you are studying GCSE Biology and twenty-one if you are studying GCSE Combined Science. You could be asked questions about the methods, safety precautions you might take, results and conclusions of these experiments.

In the exchange and transport in animals section there is one required practical activity:

Investigate the rate of respiration in living organisms

Edexcel questions courtesy of Pearson Education Ltd.

Sample question 1 - Higher

Question

This figure shows the equipment used for measuring respiration in peas.

Image caption,
Left - A, Middle - B, Right - C
  • respirometer A contains germinating peas
  • respirometer B contains peas that are not germinating
  • respirometer C contains glass beads

All three respirometers are placed in a water bath at 25掳C for 30 minutes.

The reduction in oxygen levels in each respirometer is measured using a data logger.

Explain why the respirometers are placed in a water bath at 25掳C. [2 marks]

Sample question 2 - Higher

Question

Explain why respirometer A has the highest rate of oxygen consumption. [2 marks]