Which enzyme / enzymes are responsible for transformation of lactose to galactos in the E.coli culture medium.
$B$ -galactosidase
Permease
Transacetylase
All above
E.coli cells with a mutated $Z$ gene of the lac operon cannot grow in medium containing only lactose as the source energy because
Operon is a
In lac operon, $z$ gene codes for:
In Operon concept, the regulator gene regulates chemical reactions in the cell by
In the medium where $E$. coli was growing, lactose was added, which induced the lac operon. Then, why does lac operon shut down some time after addition of lactose in the medium?