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Solution


Q.

Which of the following is required as inducer(s) for the expression of Lac operon                   [2016]
1 Lactose  
2 Lactose and galactose  
3 Glucose  
4 Galactose  

Ans.

(1)

In Lac operon, lactose is an inducer. It binds with suppressor and inactivates it. It allows RNA polymerase access to the promoter and transcription proceeds.