RecA Protein Provides the Functional Link Between DNA Damage and the SOS

question 29

Multiple Choice

RecA protein provides the functional link between DNA damage and the SOS response by displacing the LexA protein from its operator sites on the SOS genes. RecA does so by:

• A) associating with polymerase holoenzyme to help it remove LexA from operator.
• B) bending LexA operator DNA to force dissociation of LexA repressor.
• C) binding to LexA protein to weaken directly its affinity for operator sites.
• D) causing self-cleavage of LexA, thus inactivating its binding to operator.
• E) competitively binding to LexA operators and serving as an activator.

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Definitions:

Nature-Nurture Controversy

A debate concerning the relative importance of an individual's innate qualities (nature) versus personal experiences (nurture) in determining or causing physical and behavioral traits.

Biological Explanation

An approach interpreting behaviours and phenomena based on biological factors such as genetics, brain structures, and evolutionary influences.

Aggression

Behavior intended to harm or injure another being, either physically or psychologically.

Incidence Of Murders

The frequency or number of murder cases that occur within a defined population and time period.