A Sample of the Same DNA Is Placed into Each

question 27

Multiple Choice

A sample of the same DNA is placed into each of two test tubes.Each tube is treated with a restriction enzyme,and the resulting fragments are separated by gel electrophoresis,producing the gel shown in the following figure.Which of the following explains why the pattern of DNA fragments differs in these two samples?

• A) Different restriction enzymes must have been used in the different tubes.
• B) One tube was heated,but the other tube was not.
• C) Ligase was added to one of the tubes but not the other.
• D) The restriction enzyme added to the tubes cut DNA at more than one sequence.

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Definitions:

Stimulus Discrimination

The process by which individuals learn to differentiate among similar stimuli and respond appropriately to each.

Routine Problem Solving

A consumer decision-making process used for purchasing frequently bought, low-cost items that requires minimal search and decision effort.

Stimulus Discrimination

The ability of an individual to differentiate between similar stimuli and respond to them differently.

Selective Retention

The psychological process by which individuals remember information that is consistent with their beliefs and attitudes while forgetting or ignoring contradictory information.