NEET 2010 Biology question

The lac operon consists of

(1)Three regulatory genes and three structural genes
(2)Four regulatory genes only
(3)One regulatory gene and three structural genesCorrect
(4)Two regulatory genes and two structural genes

Answer: (3)

Solution

In E. coli the lac operon (Jacob and Monod) consists of one regulatory gene, the i gene, which codes for the repressor, and three structural genes: z (beta-galactosidase), y (permease) and a

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Question ID VK-090443