Question

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 would likely occur when the cell is exposed to lactose?
A) The repressor will no longer bind to the operator.
B) The operon will never be transcribed.
C) The inducer will no longer bind to the repressor.
D) The structural genes will be transcribed continuously.
E) The repressor protein will no longer be produced.

Answer 1

D) The structural genes will be transcribed continuously.

Step-by-step explanation:

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, the structural genes will be transcribed continuously.

A structural gene is a gene that codes for any RNA or protein product other than a regulatory factor (i.e. regulatory protein).