Question 1Section 1 style
A substance blocks the channel of ATP synthase in isolated mitochondria, so that nothing can pass through it. Which describes the effect?
Higher Biology extended responses
The paper has two extended-response questions worth 10 to 15 marks in total, each with a choice of topic. Each mark is a separate correct point, so plan the points before you write.
| Question paper | 2 hours 30 minutes, 100 marks |
|---|---|
| Section 1 | 20 marks of multiple choice |
| Section 2 | 80 marks of written answers |
| Exam day 2027 | Wednesday 12 May, 09:00 to 11:30 |
Write for the marks
- Read the command word: describe asks for facts in order; explain asks why or how.
- List the points you know before you write: each correct, separate point is a mark.
- Use the key terms of the course exactly (for example, "RuBisCO fixes carbon dioxide by attaching it to RuBP").
Try 2 questions
Question 2Section 1 style
Breeders compare a new potato cultivar with an established one at three farms. At each farm each cultivar is grown in eight plots, randomised across the field. The new cultivar's plots are sprayed with a fungicide; the established cultivar's plots are not. The new cultivar gives the higher mean yield at every farm. Why can the higher yield not be put down to the cultivar alone?
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How many extended responses are there?
Two, worth 10 to 15 marks in total. Both include a choice of topic.