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Review Figure 19 $\beta$ -Galactosidase and LacY Coding Sequence for Lactose Permease Are Genes

Question 182

Multiple Choice

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

A) The lacZ coding sequence for $\beta$ -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.

Correct Answer: