In the microarray shown in Figure 15.1, if you were searching for genes whose expression was
inhibited by hormone treatment, you would search for sequences spotted on the array that
showed ________ fluorescence.
A) no
B) high levels of
C) green
D) red
E) yellow

If she moves the promoter for the lac operon to the region between the beta galactosidase
(lacZ) gene and the permease (lacY) gene, which of the following would be likely?
A) The three structural genes will be expressed normally.
B) RNA polymerase will no longer transcribe permease.
C) The operon will no longer be inducible.
D) Beta galactosidase will not be produced.
E) The cell will continue to metabolize but more slowly.

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 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 structural genes will be transcribed continuously.
E) The repressor protein will no longer be produced.