CK-12 Foundation
Ck 12: Gene Regulation in Prokaryotes
[Free Registration/Login may be required to access all resource tools.] Provides an overview of gene regulation in prokaryotic cells while defining operon, explaining the roles of the operator, the promoter, and the repressor, and...
CK-12 Foundation
Ck 12: Biology: Prokaryotic Gene Regulation
[Free Registration/Login may be required to access all resource tools.] Covers gene regulation in prokaryotes.
Nature Research
Scitable: Gene Expression and Regulation
Investigate gene expression with this collection of resources that explains how DNA is expressed to make RNA, how genes are turned "on" and "off", and what must occur for transcription to happen. The webpage explores gene expression by...
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Gene Machine: The Lac Operon
Build a gene network. The lac operon is a set of genes which are responsible for the metabolism of lactose in some bacterial cells. Explore the effects of mutations within the lac operon by adding or removing genes from the DNA.
Khan Academy
Khan Academy: Overview: Gene Regulation in Bacteria
Get an overview of operons, regulatory DNA sequences, and regulatory genes. Also, explore repressor and activator proteins.
Cold Spring Harbor Laboratory
Dna From the Beginning: Genes Can Be Turned on and Off
Two French scientists describe the research they did to figure out how bacteria turn certain genes on and off. The topic is a little involved, but the animations should help you understand the process.
Khan Academy
Khan Academy: The Lac Operon
Learn about the regulation of genes for lactose utilization. lac repressor, catabolite activator protein, and cAMP.
Khan Academy
Khan Academy: The Trp Operon
Learn how the trp repressor controls gene expression. Find out about feedback inhibition and attenuation.
Khan Academy
Khan Academy: Regulation of the Iac Operon
Read a passage about the regulation of the Iac Operon and answer the follow-up questions.