# "Explain" questions — Eduqas A-Level Biology

> 76 questions · biology

## How to answer

WHAT + WHY. Every point paired with a because. Structure: X happens because Y. This causes Z because … Assessment Objective: AO2. Every "explain" answer on this spec is marked against exactly this pattern.

## Sample questions

1. [Adrenaline is a hormone released during the 'fight-or-flight' response. Explain how adrenaline reaches its target organs…](https://www.gradenine.co.uk/q/adrenaline-is-a-hormone-released-during-005ae074)
2. [During the cell cycle, DNA replication occurs in the nucleus before a cell can divide. Explain how DNA replication produ…](https://www.gradenine.co.uk/q/during-the-cell-cycle-dna-replication-0c54ef30)
3. [Explain how the hormone insulin helps to restore blood glucose concentration back to its optimum level after a meal high…](https://www.gradenine.co.uk/q/explain-how-the-hormone-insulin-helps-0d1ff169)
4. [Phloem and xylem are the two main transport vessels in plants. Explain how the structure of phloem vessels is adapted to…](https://www.gradenine.co.uk/q/phloem-and-xylem-are-the-two-12f1b456)
5. [A scientist is investigating DNA replication. Explain why it is important that DNA replication produces an exact copy of…](https://www.gradenine.co.uk/q/a-scientist-is-investigating-dna-replication-133e5690)
6. [HIV is a communicable disease caused by a virus. Explain how the human body responds to HIV once it has entered the bloo…](https://www.gradenine.co.uk/q/hiv-is-a-communicable-disease-caused-147a92a8)
7. [Explain how the human body defends itself against pathogens before they enter the body and after they have entered the b…](https://www.gradenine.co.uk/q/explain-how-the-human-body-defends-169cd1da)
8. [Explain how a nerve impulse passes from one neurone to the next across a synapse.](https://www.gradenine.co.uk/q/explain-how-a-nerve-impulse-passes-1b881027)

## Related

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