Written by Bassam El Masriitten, a 2015 Galbraith winner from the University of Ontario Institute of Technology
After teaching DNA replication and protein synthesis (transcription and translation), students are expected to be familiar with the mechanisms that control gene expression. A commonly studied example, in prokaryotes, is the Lac Operon (inducible model) and/or the Trp Operon (repressible model).
The procedure that follows outlines the steps for a teacher to build a Lac Operon model in order to demonstrate to the whole class how an operon functions. Students should be given time in class to look closely at the model themselves and manipulate it in order to better grasp the concept and be able to complete the assignment which follows.