Where Would the Lac Repressor Be Bound in a (Nonmutant)

question 17

Multiple Choice

Where would the lac repressor be bound in a (nonmutant) E. coli cell that is growing in low glucose and high lactose? (I = lac repressor gene; Z, Y, A = lac operon structural genes; P = lac promoter; O = lac operator)

• A) P
• B) O
• C) P and O
• D) I, P, O
• E) The repressor would not be bound.

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