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.
Estrella Mountain Community College
Online Biology Book: Cellular Metabolism and Fermentation
College-level, online textbook explains cellular metabolism and fermentation using full-color illustrations and labeled diagrams.
Sophia Learning
Sophia: Enzymes Proteins That Pack a Punch!
Through a combination of slide show tutorials and a video demonstration, learn how enzymes work. [3:00]