Concept 9 Practice

Controlling the lac Operon

This exercise consists of four questions. The first is visible below.

Answer each question by clicking on a symbol, dragging it to its site of action in the white area, and releasing it there. Incorrectly chosen symbols will return to their starting location.

After you have moved the correct symbol, push the Submit button. If you moved it to the correct location, an animation will play. You can either use the Repeat button to repeat the question, or use the Continue button to proceed to the next question.