Considering the Diagrams Below That Show Hydrogen-Bond Donors and Acceptors

question 14

Multiple Choice

Considering the diagrams below that show hydrogen-bond donors and acceptors as well as hydrophobic groups in four DNA base pairs, which of the following do you think is the most difficult to accomplish by DNA-binding proteins?

• A) Distinguishing between A-T and T-A in the major groove
• B) Distinguishing between A-T and C-G in the major groove
• C) Distinguishing between C-G and G-C in the major groove
• D) Distinguishing between C-G and G-C in the minor groove
• E) Distinguishing between C-G and T-A in the minor groove

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Definitions:

Disinhibition

When the conditioned stimulus elicits a conditioned response (CR) after a novel stimulus is presented during extinction

Novel Stimulus

A new or unfamiliar stimulus that has not been previously experienced by an organism.

Conditioned Response

A response that is acquired due to the association of a neutral stimulus with an unconditioned stimulus, leading to a conditioned reaction.

Behavioral Contrast

A phenomenon where the rate of response to a stimulus changes when the conditions of reinforcement for another stimulus are altered.