transacetylase inducer
lacZ lacY
lacA
lac promoter}
lac operator
β-galactosidase
lacI gene
permease
lacI repressor
lac promotor
allolalactose
1. The {__} gene encodes the enzyme {}, which hydrolyzes the disaccharide lactose into two monosaccharides: glucose and galactose.
2. The {} gene encodes the enzyme {_}, a membrane transport protein that facilitates the movement of lactose into the cell.
3. The {_} gene encodes {_}, an enzyme that detoxifies other molecules that might enter the cell through permease.
4. RNA polymerase binds to the {} in order to transcribe the three lac genes.
5. The {} controls whether or not RNA polymerase can transcribe the genes.
6. The {_}, which lies just upstream from the lac operon, encodes the {____} protein that binds to the operator to regulate the activity of the operon.

The lacY gene encodes a permease that features as a membrane-spanning shipping protein to deliver lactose into the cell, and the lacA gene encodes a transacetylase enzyme that transfers an acetyl organization from acetyl CoA to beta-galactosidase.

β-Galactosidase (lacZ) has bifunctional activity. It hydrolyzes lactose to galactose and glucose and catalyzes the intramolecular isomerization of lactose to allolactose, the lac operon inducerThe gene encodes the enzyme , which hydrolyzes the disaccharide lactose into monosaccharides: glucose and galactose.