Match the following genes of the Lac operon with their respective products.
Column I Column II
(A) i gene (i) $β$ -galactosidase
(B) z gene (ii) Permease
(C) a gene (iii) Repressor
(D) y gene (iv) Transacetylase

Easy

Solution

i gene code for the repressor
z gene code for β galactosidase
a gene code for transacetylase
y gene code for permease.
‘i’ gene is constitutively expressed, and it synthesizes a protein that binds to the operator. gene ‘z, y, a’ are non-constitutive genes. They are also the structural genes present in lac operon.

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