Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) E.coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because- - Sarthaks eConnect

E.coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because:-

E.coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because:-

A.

The lac operon is constitutively active in these cells

B.

They cannot synthesize functional `beta` – galactosidase

C.

In the presence of glucose E.coli cells do not utilize lactose

D.

They cannot transport lactose from the medium into the cell