GCSEBiologyWJECRevision Notes2. Variation, Homeostasis & Micro-organisms2.2 Cell Division & Stem CellsUncontrolled Mitosis & Cancer

Uncontrolled Mitosis & Cancer (WJEC GCSE Biology): Revision Note

Exam code: 3400

Written by: Ruth Brindle

Reviewed by: Lára Marie McIvor

Updated on 2 July 2026

Uncontrolled Mitosis & Cancer

Cells in the body divide by mitosis to produce more cells
- This is essential for growth and to repair damaged cells
Mitosis is regulated by many different genes to ensure that cells divide only when they need to and stop when required
Mutations in the DNA can lead to uncontrolled mitosis and therefore uncontrolled cell division; this is the cause of cancer
- Uncontrolled cell division can result in the formation of tumours

Unlock more, it's free!

Join the 100,000+ Students that ❤️ Save My Exams

the (exam) results speak for themselves:

I would just like to say a massive thank you for putting together such a brilliant, easy to use website.I really think using this site helped me secure my top gradesin science and maths. You really did save my exams! Thank you.

Beth
IGCSE Student

This website is soooo useful and I can’t ever thank you enough for organising questions by topic like this. Furthermore, the name of the website could not have been more appropriate as it literally did SAVE MY EXAMS!

Fathima
A Level Student

Incredible! SO worth my money, the revision notes have everything I need to know and are so easy to understand. I actually enjoy revising! It makes me feel a lot more confident for my GCSEs in a few months.

Kate
GCSE Student

Absolutely brilliant, both my girls used it for A levels and GCSE. It's saves on paper copies, also beneficial exam questions ranked from easy to hard. It's removed a lot of stress from the exams.

Sameera
Parent

Just to say that your resources are the best I have seen and I have been teaching chemistry at different levels for about 40 years

Mark
Chemistry Teacher

Excellent

Author: Ruth Brindle

Expertise: Curriculum Expert

Ruth graduated from Sheffield University with a degree in Biology and went on to teach Science in London whilst also completing an MA in innovation in Education. With 10 years of teaching experience across the 3 key science disciplines, Ruth decided to set up a tutoring business to support students in her local area. Ruth has worked with several exam boards and loves to use her experience to produce educational materials which make the mark schemes accessible to all students.

Reviewer: Lára Marie McIvor

Expertise: Content Creator

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.