12. Gene Regulation in Prokaryotes
Lac Operon
33PRACTICE PROBLEM
If a strain is lac+, it means that it can grow on a lactose-only medium. However, if the strain is lac-, it will not grow on a lactose-only medium. Identify which of the following cases makes the strain lac-.
If a strain is lac+, it means that it can grow on a lactose-only medium. However, if the strain is lac-, it will not grow on a lactose-only medium. Identify which of the following cases makes the strain lac-.