AP Biologyeasymcq1 pt
In the lac operon, the operator is
A.the DNA site where the repressor binds
B.a protein that binds lactose
C.the enzyme that digests lactose
D.the promoter's synonym
Explanation
Core Concept
Repressor occupancy of the operator blocks RNA polymerase from the structural genes — the physical switch of the operon.
Correct Answer
Athe DNA site where the repressor binds
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