Review Figure 19.15 below: Which one of the following statements about the lactose operon is not correct?
A. The lacZ coding sequence for -
galactosidase and lacY coding sequence for
lactose permease are genes called structural
genes.
B. lacO is a gene sequence coding for the
operator.
C. The promoter sequence recruits RNA
polymerase complex and the initiation of
transcription.
D. lacI is a gene sequence coding for the
repressor which binds to the operator,
inhibiting transcription.
E. The CRP-cAMP binding site promotes
transcription of lactose operon genes if cAMP
is high, which indicates that glucose is low
and lactose metabolism is needed for energy
production.
B
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