Which of the following is not true of the three operators of the lac operon?
A. One of the operators is contained within the lacZ gene.
B. All three operators are bound simultaneously by the Lac repressor to repress the expression of the operon.
C. The DNA between the operators bound by the Lac repressor is looped out to sterically hinder RNA polymerase.
D. Two of the three operators are upstream of the transcriptional start site.
B
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