The Genetic Code Is Well Described and All 64 Possible

question 89

Multiple Choice

The genetic code is well described and all 64 possible codons are accounted for. How do cells insert the 'twenty first' amino acid selenocysteine?

• A) It is encoded by one of the extra serine codons.
• B) It is encoded by one of the extra leucine codons.
• C) It is encoded by one of the extra arginine codons.
• D) It is encoded by one of the stop codons.

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Definitions:

Antidepressant Drugs

Medications prescribed to alleviate symptoms of depression by adjusting chemical imbalances in the brain.

Serotonin

A neurotransmitter involved in many functions including mood regulation, digestion, and sleep.

Dopamine

A neurotransmitter in the brain that plays a key role in regulating mood, sleep, learning, and movement, often associated with the pleasure and reward system.

Norepinephrine

A neurotransmitter involved in the body's response to stress and regulation of mood, attention, and arousal.