Chapter 16.6 Gene Control (The Lac Operon & Control in Eukaryotes)

How do organisms turn off the genes they don't need? This video explains how the lac operon, a length of structural and regulatory genes, control the expression of beta-galactosidase enzymes in prokaryotes. In this video, I explain what happens in the lac operon when lactose is absent and when lactose is present. I also explain the role gibberellin plays in regulating the genes that code for amylase and how it combines with an enzyme in seeds to break down the DELLA protein and allow the PIF transcription factor to produce RNA for amylase production.