A Mutant E

question 39

Multiple Choice

A mutant E. coli strain, grown under conditions that normally induce the lac operon, produces particularly high amounts of ß-galactosidase. What is a possible genotype of the cells?

• A) lacI⁺ lacP⁺ lacO⁺ lacZ^- lacY⁺ lacA⁺
• B) lacI⁺ lacP⁺ lacO^c lacZ⁺ lacY⁺ lacA⁺
• C) lacI^- lacP⁺ lacO⁺ lacZ^- lacY⁺ lacA⁺
• D) lacI⁺ lacP^- lacO⁺ lacZ⁺ lacY⁺ lacA⁺
• E) lacI^- lacP^- lacO⁺ lacZ^- lacY⁺ lacA^-

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Definitions:

Paired Comparison

A method used to evaluate, rank, or choose between alternatives by comparing them directly with each other in pairs.

Ranking

Ranking is the act of ordering or classifying entities based on criteria or performance, often used for comparison or competitive purposes.

Forced Distribution

A performance evaluation method where employee evaluations are distributed along a bell curve, forcing a ranking of employees into categories.

Performance Management

The comprehensive approach of setting objectives, assessing progress, and providing ongoing feedback to ensure that employees meet their career goals and organizational needs.