試題詳解

9. A mutation that inactivates a regulatory gene of a repressible operon in an E. coli cell would result in_______.  
(A) continuous transcription of the structural gene controlled by that regulator.
(B) no binding of the repressor to the operator.
(C) complete activation of transcription of the structural gene controlled by that regulator.
(D) continuous translation of the mRNA because of alteration of its structure.
(E) no gene will be affected.