Various Techniques Have Been Developed to Isolate Strains of Bacteria

question 17

Multiple Choice

Various techniques have been developed to isolate strains of bacteria carrying a particular mutation.In one,bacteria containing wild-type cells and cells of a desired mutant are grown on a medium lacking the nutrient for which the desired mutants are auxotrophic but containing the an antibiotic that only kills growing cells.In this environment,

• A)both wild-type and mutant cells are killed.
• B)both wild-type and mutant cells survive.
• C)wild-type cells survive;mutant cells die.
• D)wild-type cells die;mutant cells survive.
• E)only double mutants survivE.

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Definitions:

Proactive Interference

The phenomenon where older memories interfere with the recall of newer memories.

Encoding Failure

A situation where information does not get stored in long-term memory due to insufficient encoding during the learning phase.

Source Amnesia

A memory disorder where one can recall certain information but is unable to remember where, when, or how they learned that information.

Working Memory

The part of short-term memory that is concerned with immediate conscious perceptual and linguistic processing.