Identify the statement that is incorrect regarding lac operon - Sri Chaitanya Infinity Learn Best Online Courses for NCERT Solutions, CBSE, ICSE, JEE, NEET, Olympiad and Class 6 to 12

A
It is having positive as well as negative regulation
B
Lac z-gene is constitutive gene
C
In the absence of inducer repressor binds to operator
D
Inducer for lac – operon is allolactose

Solution:

The repressor of the operon is synthesised (all-the-time – constitutively) from the i gene. Lac z is a non-constitutive gene. It produces beta galactosidase only when lactose is present in the medium and other carbon sources are absent.