Portions of Pre-MRNA That Do NOT Code for Parts of a Protein

question 9

Multiple Choice

Portions of pre-mRNA that do NOT code for parts of a protein are called ________.

• A) introns
• B) start codons
• C) exons
• D) stop codons
• E) Introns, start codons, and stop codons code for parts of a protein.

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Definitions:

Dopamine Levels

The concentration of dopamine, a neurotransmitter associated with the brain's reward and pleasure centers, motor function, and regulation of mood.

Axon

The neuron extension that passes messages through its branches to other neurons or to muscles or glands.

Neuron

A specialized cell transmitting nerve impulses; a nerve cell.

Neurotransmitter

Chemical substances that transmit signals across a synapse from one neuron to another in the nervous system.