Repressible operons require that _____ bind to the repressor protein before it can bind to the operator.
A)the product
B)a cofactor
C)a coenzyme
D)the substrate
E)the reactant

Question

Quizplus · Accepted Answer

Repressible operons are controlled by repressor proteins that bind to the operator region of DNA to prevent transcription of certain genes. In order for transcription to occur, the repressor protein must first bind to a specific molecule called the product. This molecule is typically the end product of the metabolic pathway that is regulated by the operon. When the product binds to the repressor, it causes a conformational change that prevents the repressor from binding to the operator, allowing transcription to occur.

Repressible Operons Require That _____ Bind to the Repressor Protein