When Tryptophan Binds to the Trp Repressor, What Is the Effect

question 32

Multiple Choice

When tryptophan binds to the Trp repressor, what is the effect on the repressor:operator interaction?

• A) The K_d for the repressor:operator complex increases, lowering affinity.
• B) The K_d for the repressor:operator complex decreases, increasing affinity.
• C) The K_d for the repressor:operator complex increases, increasing affinity.
• D) The K_d for the repressor:operator complex decreases, lowering affinity.
• E) There is no change in K_d.

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Definitions:

Cognitive Map

A mental representation of one's physical environment, facilitating navigation and understanding of spatial relationships.

Latent Learning

Learning that occurs without any obvious reinforcement and is not demonstrated until there is an incentive to do so.

Fixed-interval

A method of reinforcement where rewards are dispensed for the initial response after a set time period has elapsed.

Variable-interval

A schedule of reinforcement where a response is rewarded after an unpredictable amount of time has passed, in behaviorism.