In lac operon, lactose of lac operon is :

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Inducer

Co-inducer

Repressor

Co-repressor

answer is A.

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Detailed Solution

Concept- Lactose stops binding of operator and repressor protein.
Lactose works like a barrier between operator and repressor sugar. It is responsible for preventing the transcription process. It binds with repressor protein and acts as an inducer of lac operon.
Hence, option 1 is the correct answer.

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