Which One of the Following Contributes to the Utility of the Strains

question 9

Multiple Choice

Which one of the following contributes to the utility of the strains of Salmonella typhimurium used in the Ames reversion assay?

• A)They are highly permeable to test substances.
• B)They are defective in DNA repair and,therefore,cannot readily repair damage done by the test substances.
• C)It is very straightforward to assay the conversion of their histidine auxotrophy mutations to histidine prototrophy.
• D)all of the choices

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Definitions:

Long-term Memory

The aspect of memory in which information is stored for extended periods, ranging from several minutes to a lifetime.

Retroactive Interference

A memory impairment phenomenon where new information interferes with the recall of old information.

Encoding

The initial process of transforming sensory information into a form that can be stored and recalled later from the memory.

Decay

The process of decline in quality, power, or vigor; the decomposition of organic matter.