a. the operator is in the first part of the lacZ gene
b. the operator is crossed by RNA polymerase before RNA polymerase reaches the genes, which code for enzymes
c. the operator is crossed by RNA polmerase before RNA polymerase crosses the promoter
d. the operator is separated from the lacZ gene by thousands of bases
e. an intron separates the operator and the genes, which code for enzymes
The opreator of the lac operon is upstream of the genes, which codes for enzymes, 'Upstream' means?
b)
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