The lac Operon consists of:
One regulatory gene and three structural genes
Two regulatory genes and two structural genes
Three regulatory genes and three structure genes
Four regulatory genes only
the lac operon consists of one regulatory gene (the i gene, which codes for the repressor) and three structural genes (z, y, and a). The z gene codes for beta-galactosidase, the y gene for permease, and the a gene for transacetylase .
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