In lac operon, z gene codes for
- Transacetylase
- β-galactosidase
- Permease
- Repressor
Answer
(2) β-galactosidase
Solution
As per NCERT, in the lac operon the i gene codes for the repressor, the z gene codes for β-galactosidase, the y gene codes for permease and the a gene codes for transacetylase.
β-galactosidase hydrolyses lactose into galactose and glucose.
Answer: (2)