A Mutant E

question 12

Multiple Choice

A mutant E. coli strain, grown under conditions that normally induce the lac operon, does not produce 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) lacl⁺ lacP⁺ lacO⁺ lacZ⁺ lacY⁺ lacA⁺
• D) lacI⁺ lacP^- lacO⁺ lacZ⁺ lacY⁺ lacA⁺
• E) lacI^- lacP⁺ lacO^- lacZ⁺ lacY⁺ lacA^-

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Definitions:

Fixed Role Therapy

A psychotherapeutic technique in which the client acts out constructs appropriate for a fictitious person. This shows the client how the new constructs can be more effective than the old ones he or she has been using.

Existing Constructs

Pre-established concepts or frameworks used to understand or interpret various phenomena.

Anticipating Events

The process of predicting or expecting future occurrences based on current or past information.

Role Construct Repertory

A psychological test and theory that assesses how individuals construe significant people in their lives, reflecting their personal construct systems.