Question

How many structural genes are present in lac operon?

Answer 1

Lac operon:

1. Lac operon is a gene segment that helps in the regulation of lactose utilization in the body.
2. Lac operon comprises three structural genes, i.e., lac Z, lac Y, and lac A.
3. Lac Z gene synthesizes galactosidase enzyme which helps in the isomerization of lactose to galactose and glucose.
4. Lac Y gene synthesizes permease that increases the permeability of the cell which helps in the uptake of B-galactosidase
5. Lac A gene synthesizes transacetylase enzyme which helps in transferring an acetyl group from acetyl-CoA to galactosides, lactosides, and glucosides.