When the inducer (lactose) is removed, the repressor returns to its original conformation and binds to the DNA, so that RNA polymerase can no longer get past the promoter. No RNA and no protein is made.
When the inducer (lactose) is removed, the repressor returns to its original conformation and binds to the DNA, so that RNA polymerase can no longer get past the promoter. No RNA and no protein is made.