Read the following statement and select the incorrect statement from the given options. I. Opero...

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Read the following statement and select the incorrect statement from the given options.
I. Operon is a segment of DNA that comprises one or more structural genes, an operator gene, a promoter gene and a regulator gene.
II. Regulator gene controls the operator gene in cooperation with a chemical compound called inducer.
III. The repressor physically activates the binding of RNA polymerase to the promoter and so keeps the genes turned on.

IV. The promoter sequence is located upstream of structural gene.
(1) Only III
(2) I and II
(3) II and III
(4) III and IV
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