# 5-mark practice questions — WJEC A-Level Biology (Wales)

> 120 questions · biology

## How to answer

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

## Sample questions

1. [Explain why it is difficult for scientists to research the structure and functions of the human brain.](https://www.gradenine.co.uk/q/explain-why-it-is-difficult-for-0011e027)
2. [A person has been exercising vigorously in hot weather and has not drunk any water for several hours. Explain what happe…](https://www.gradenine.co.uk/q/a-person-has-been-exercising-vigorously-0083cde2)
3. [A patient is diagnosed with cancer after a routine screening. Explain how cancer develops in the body and describe two c…](https://www.gradenine.co.uk/q/a-patient-is-diagnosed-with-cancer-047456a6)
4. [Adrenaline is a hormone released during the 'fight-or-flight' response. Describe the role of adrenaline in preparing the…](https://www.gradenine.co.uk/q/adrenaline-is-a-hormone-released-during-07d5e2b4)
5. [The cell membrane is described as selectively permeable and controls the movement of substances into and out of the cell…](https://www.gradenine.co.uk/q/the-cell-membrane-is-described-as-0af01602)
6. [A leaf is adapted for efficient gas exchange. Describe the adaptations of a leaf that allow efficient gas exchange betwe…](https://www.gradenine.co.uk/q/a-leaf-is-adapted-for-efficient-0e11be33)
7. [Explain how temperature affects the rate of an enzyme-controlled reaction, including what happens both below and above t…](https://www.gradenine.co.uk/q/explain-how-temperature-affects-the-rate-11d723f7)
8. [Describe how the human body produces monoclonal antibodies and explain one way in which they can be used in medicine.](https://www.gradenine.co.uk/q/describe-how-the-human-body-produces-11e31674)

## Related

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