When Bacteriophages Invade Bacterial Cells,they Leave Behind DNA That Is

question 19

Multiple Choice

When bacteriophages invade bacterial cells,they leave behind DNA that is recognized by the bacteria as foreign and can be eliminated in the event of another attack,reminiscent of adaptive immunity.This natural process can be adapted in the lab so that a combination of guide DNA and nucleases facilitate the cutting of DNA at a precise location in any organism.  Here we are describing ________.

• A)CRISPR
• B)gene therapy
• C)recombinant DNA technology
• D)synthetic biology
• E)metagenomics

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Definitions:

Immediate Reinforcer

A reward that occurs directly following a behavior, which increases the likelihood of that behavior being repeated.

Variable-ratio Schedule

A reinforcement schedule in operant conditioning where a response is rewarded after an unpredictable number of responses, which tends to produce high and steady rates of response.

Continuous Reinforcement

A method of learning where every correct response is reinforced every time, leading to faster acquisition of behavior but quicker extinction once reinforcement stops.

Partial Reinforcement

A conditioning schedule where only some responses are reinforced, leading to more resistant behaviors to extinction.