The order of the structural genes in the lac operon is
A) 5'-lacY-lacZ-lacA-3'.
B) 3'-lacY-lacA-lacZ-5'.
C) 5'-lacZ-lacY-lacA-3'.
D) 3'-lacZ-lacY-lacA-5'.
E) 5'-lacA-lacY-lacZ-3'.

Question

Quizplus · Accepted Answer

The correct order of the structural genes in the lac operon is 5'-lacZ-lacY-lacA-3'. LacZ encodes β-galactosidase, lacY encodes permease, and lacA encodes transacetylase.

The Order of the Structural Genes in the Lac Operon