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Q.

Identify the incorrect statement for lac operon model.

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a

RNA polymerase stay away from promoter in the presence of repressor

b

Lactose acts as inducer which inactivates repressor

c

Regulation of lac operon by repressor is referred to as negative regulation

d

The repressor of the operon is synthesised during specific periods from r-gene

answer is D.

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Detailed Solution

The repressor of the operon is synthesised (all-the-time constitutively) from the i gene. The repressor protein binds to the operator region of the operon and prevents RNA polymerase from transcribing the operon. 

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