Solutions
Induced Enzyme Produced as needed; lac operon must be induced to produce energy
from lactose
Positive Regulation of Lac Operon cAMP & CAP
Negative Regulation of Lac Operon LacI repressor & allolactose inducer
Operon Unit of linked genes
Lac Z B-galactosidase; cleaves lactose monomers & makes allolactose initiator from
lactose. B-galactosidase activity in an environment where ONLY lactose is available
Lac Y Permease; transports lactose into cells
LacA Transacetylase; not involved with lactose metabolism, moves excess sugar out of
the cell