Uploaded January 2025 | Updated September 2026, 1 day ago

---

In this video, we look at the lac operon. First we explore what is meant by an operon. We then look at how the lac operon allows E.coli bacteria to metabolise lactose. This includes the role of the lac repressor protein and cyclic AMP receptor protein.

Image credits:

E. coli

commons.wikimedia.org/wiki/File:E_coli_at_10000x,_original.jpg
Photo byfkfkrErbe, digital colorization by Christopher Pooley, both of USDA, ARS, EMU., Public domain, via Wikimedia Commons