What would be the result of a mutation that deactivates the regulatory gene of a repressible operon in an Escherichia coli cell?
A)continuous transcription of the enzyme-coding gene controlled by that regulator
B)complete inhibition of transcription of the enzyme-coding gene controlled by that regulator
C)irreversible binding of the repressor to the operator
D)inactivation of RNA polymerase by alteration of its active site

Question

Quizplus · Accepted Answer

If the regulatory gene of a repressible operon in an E. coli cell is mutated and deactivated, the repressor protein will not be produced. This means that the repressor will not bind to the operator, allowing RNA polymerase to bind and continuously transcribe the enzymes coded for by the operon.

What Would Be the Result of a Mutation That Deactivates