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Byju's Answer
Standard XII
Biology
Competitive Inhibition
Which one of ...
Question

Which one of these substances will repress the lac operon?

A
Arabinose
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B
Glucose
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C
Lactose
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D
Tryptopham
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Solution

The correct option is B Glucose
Excess of glucose prevent formation of allolactose thus repressure remaining
active lac-operon turn off.

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