An inducer
A) inhibits the synthesis of needed enzyme(s).
B) stimulates the synthesis of needed enzyme(s).
C) binds to the promoter and prevents the repressor from binding to the operator.
D) binds to the operator and prevents the repressor from binding at this site.
E) is the same as a promoter.

Question

Quizplus · Accepted Answer

An inducer is a molecule that stimulates the synthesis of needed enzyme(s) by binding to the repressor and preventing it from binding at the operator site. This allows RNA polymerase to access the promoter region and transcribe the genes necessary for the synthesis of the enzyme(s). Therefore, choice B is the correct answer.

An Inducer