IB Biology Sub-topic D2.1 Definitions

This page contains our IB Biology definitions for sub-topic D2.1. By learning each one of these definitions, you will fully cover the content for IB Biology 'Cell cycle'.
HL
cyclin

A protein that is involved in control of the cell cycle

HL
oncogene

Genes involved in regulation of the cell cycle

Great Work!

You have now covered all of our topic 2 definitions for IB biology.
Now that you have completed these IB biology topic 2 definitions, dive into our topic 2 videos for the IB biology course.
IB biology topic 2 videos

Explored IB Biology?

Get stuck into one of our other subjects!
Join 85,000 students, across 130+ countries, in 500+ IB schools. That's half of the IB science graduates worldwide.
Start a 7d free trial