Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome.If she moves the operator to the far end of the operon,past the transacetylase (lacA)gene,which of the following results would likely occur when the cell is exposed to lactose?
A)The inducer will no longer bind to the repressor.
B)The repressor will no longer bind to the operator.
C)The operon will never be transcribed.
D)The three genes of the operon will be transcribed continuously.

Question

Quizplus · Accepted Answer

Moving the operator past the transacetylase (lacA) gene would result in the three genes of the operon being transcribed continuously, as the repressor would no longer be able to bind to the operator and block transcription. This would result in the continuous expression of lactose-utilizing enzymes, even in the absence of lactose.

Suppose an Experimenter Becomes Proficient with a Technique That Allows