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Which enzyme/s will be produced in a cell in which there is a nonsense mutation in the lac Y gene?
A
Lactose permease and transacetylase
B
$\beta$-galactosidase
C
Lactose permease
D
Transacetylase
Detailed Solution
A nonsense mutation in lac Y stops translation there, so permease is not made and the downstream transacetylase is also not produced.
Only the upstream lac Z product, $\beta$-galactosidase, is formed.
Only the upstream lac Z product, $\beta$-galactosidase, is formed.