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:

Sensation

The method through which sensory receptors and the nervous system detect and depict external environmental stimuli.

Gestalt Psychology

A theory of mind and brain proposing that the operational principle of the brain is holistic, parallel, and analog, with self-organizing tendencies; or, the idea that the whole is more than the sum of its parts.

Parapsychology

A field of study concerned with investigating paranormal and psychic phenomena that are not yet explainable by science.

Behavioral Psychology

Behavioral psychology is a field of psychology that focuses on studying and altering human behavior through conditioning and reinforcement.