Which of the Following Combinations Will Produce the Highest Expression

question 34

Multiple Choice

Which of the following combinations will produce the highest expression of ?-galactosidase? Assume crp^- is a complete deletion of CRP (cAMP receptor protein) .

• A) lacO^c,crp^- on medium with glucose but no lactose
• B) lacO^c,crp^- on medium with lactose but no glucose
• C) lacO^c,crp^- on medium with both glucose and lactose
• D) lacO^c,crp⁺ on medium with both glucose and lactose
• E) lacO^c,crp⁺,on medium with no lactose and no glucose

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