Which of the Following Did Watson and Crick Already Know

question 32

Multiple Choice

Which of the following did Watson and Crick already know when they were trying to determine the structure of DNA?

• A)The number of purines is always larger than the number of pyrimidines.
• B)The number of pyrimidines is always larger than the number of purines.
• C)The number of cytosines is always the same as the number of adenines.
• D)The number of guanines is always the same as the number of thymines.
• E)The number of purines is always the same as the number of pyrimidines.

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Definitions:

Classical Conditioning

An associative learning process where two stimuli are constantly paired together; the second stimulus initially causes a response which in time is caused by the first stimulus alone.

Acquisition

The phase during learning when a response is established and gradually strengthened.

Stimulus Generalization

The process by which a response that has been learned to one stimulus is also elicited by similar, but not identical, stimuli.

Stimulus Generalization

A process in conditioning where a response to a specific stimulus becomes associated with other stimuli that are similar to the original stimulus.