Exons Are Segments of a Gene That

question 57

Multiple Choice

Exons are segments of a gene that:

• A)are transcribed into segments of mRNA that are snipped out before translation.
• B)occur in prokaryotic but not eukaryotic chromosomes.
• C)consist of RNA rather than DNA nucleotides.
• D)are not transcribed by RNA polymerase.
• E)are translated into protein.

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Definitions:

Absolute Threshold

The minimum intensity of stimulation required to produce a sensory experience or for a stimulus to be detected 50% of the time.

Just Noticeable Difference

The minimum amount by which stimulus intensity must be changed in order to produce a noticeable variation in sensory experience.

Action Potentials

Quick electrical impulses that travel down the axon of a neuron, triggering the release of neurotransmitters at synapses.

Proximal Stimulation

Proximal stimulation refers to the sensory information received directly from stimuli that are in close proximity to the sensory receptors.