# 5-mark practice questions — AQA A-Level Biology (7402)

> 203 questions · biology

## How to answer

5-mark questions typically award marks for structured argument: two ideas + linked because + specific example + conclusion.

## Sample questions

1. [A student states: 'Every cell in a human body contains the same DNA, yet cells look and behave very differently from one…](https://www.gradenine.co.uk/q/a-student-states-every-cell-in-00767f83)
2. [A student looks at a plant cell and an animal cell under a microscope. The student says: 'Both cells must be making prot…](https://www.gradenine.co.uk/q/a-student-looks-at-a-plant-00cf1572)
3. [Explain why maintaining high biodiversity within a community is important for the long-term stability of that community.…](https://www.gradenine.co.uk/q/explain-why-maintaining-high-biodiversity-within-00e87429)
4. [Describe the role of enzymes in digestion and explain why a protease enzyme cannot break down starch.](https://www.gradenine.co.uk/q/describe-the-role-of-enzymes-in-02c457a1)
5. [Explain why a change in the base sequence of a gene may not always result in a change in the amino acid sequence of the …](https://www.gradenine.co.uk/q/explain-why-a-change-in-the-03c50215)
6. [Explain why the rate of photosynthesis in a plant increases as light intensity increases, but only up to a certain point…](https://www.gradenine.co.uk/q/explain-why-the-rate-of-photosynthesis-04c7903a)
7. [Explain why farmers who rear livestock often use indoor housing and controlled feeding programmes to increase the effici…](https://www.gradenine.co.uk/q/explain-why-farmers-who-rear-livestock-06595d60)
8. [A mutation occurs in a gene, changing one DNA base. Explain how this mutation could result in a non-functional protein b…](https://www.gradenine.co.uk/q/a-mutation-occurs-in-a-gene-07d56cfb)

## Related

- [AQA A-Level Biology (7402) revision notes](https://www.gradenine.co.uk/learn/aqa-a-level-biology-7402)
- [AQA A-Level Biology (7402) past papers](https://www.gradenine.co.uk/past-papers/aqa-a-level-biology-7402)
- [Practise with AI marking (free)](https://www.gradenine.co.uk/start)