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The lac operon consists of ____ structural genes.

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The lac operon consists of ____ structural genes.

(a) 1

(b) 2

(c) 3

(d) 4

This question was posed to me by my college director while I was bunking the class.

This is a very interesting question from Gene Expression Control in portion Control of Gene Expression of Cell Biology

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The correct choice is (c) 3

The best I can explain: The lac operon is an inducible operon that consists of 3 tandem structural genes namely the z gene, y gene and the gene; encoding the β-galactosidase, galactoside permease and thiogalactoside transacetylase respectively.

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