Enhancers Are Considered Transcription-Control Elements That Regulate the Expression of Eukaryotic

question 11

Multiple Choice

Enhancers are considered transcription-control elements that regulate the expression of eukaryotic genes.Which one of the following is true regarding these elements?

• A)They are only found upstream of the transcription start site.
• B)They are never found more than one kilobase away of the transcription start site.
• C)They are only found in introns.
• D)They generally range in length from about 50-200 base pairs.

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Definitions:

Genetic Variations

Differences in DNA sequences among individuals, which contribute to the uniqueness of each person's physical and behavioral characteristics.

Adaptive Genetic

Genetic changes that enhance the survival and reproduction of organisms in their environment.

Startle Response

A rapid, involuntary reaction to a sudden or threatening stimulus, often involving physical movement away from the stimulus.

Instinct

An innate, typically fixed pattern of behavior in animals in response to certain stimuli.