You have found a new operon (which you name the Wahlberg operon) in charge of regulating the expression of the genes involved in alcohol catabolism in the bacterium Marky Mark. After some experimentation, you realize that the Wahlberg operon is usually inactive. In addition, when alcohol is present, you find that the alcohol binds to and inactivates the constantly expressed repressor protein, allowing gene expression. Based on this information, which of the following is TRUE regarding the Wahlberg operon?
1) It is a repressible operon
2) It is an inducible operon
3) It is both an inducible and repressible operon
4) It functions similarly to the tryptophan operon