# "Describe" questions — Edexcel GCSE Biology (1BI0)

> 16 questions · biology

## How to answer

Say WHAT happens, in order. No reasoning. Structure: 1. First X. 2. Then Y. 3. Then Z. Assessment Objective: AO1. Every "describe" answer on this spec is marked against exactly this pattern.

## Sample questions

1. [Describe how meiosis and fertilisation together ensure that offspring produced by sexual reproduction are genetically di…](https://www.gradenine.co.uk/q/describe-how-meiosis-and-fertilisation-together-08f2596c)
2. [Describe how mutations can lead to genetic variation within a population of organisms.](https://www.gradenine.co.uk/q/describe-how-mutations-can-lead-to-0ca7b327)
3. [Describe the sequence of events that occur during mitosis, from the stage where chromosomes first become visible to the …](https://www.gradenine.co.uk/q/describe-the-sequence-of-events-that-0dc0d69b)
4. [Describe how nitrogen-fixing bacteria and nitrifying bacteria contribute to making nitrogen available for plant growth.](https://www.gradenine.co.uk/q/describe-how-nitrogen-fixing-bacteria-and-nitrifying-2ca3a951)
5. [Describe how genetic engineering could be used to produce bacteria that make human insulin.](https://www.gradenine.co.uk/q/describe-how-genetic-engineering-could-be-344bd4bc)
6. [Describe what happens during meiosis to produce gametes from a diploid cell.](https://www.gradenine.co.uk/q/describe-what-happens-during-meiosis-to-413a1a8f)
7. [Describe the roles of sensory neurones, the central nervous system (CNS), and motor neurones in producing a response to …](https://www.gradenine.co.uk/q/describe-the-roles-of-sensory-neurones-79413fc7)
8. [Describe how selective breeding could be used to produce a breed of cattle that yields a large amount of milk. Include i…](https://www.gradenine.co.uk/q/describe-how-selective-breeding-could-be-7a70fb73)

## Related

- [Edexcel GCSE Biology (1BI0) revision notes](https://www.gradenine.co.uk/learn/edexcel-gcse-biology-1bi0)
- [Edexcel GCSE Biology (1BI0) past papers](https://www.gradenine.co.uk/past-papers/edexcel-gcse-biology-1bi0)
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