What Happens When a Stop Codon Is Reached by a Ribosome

question 33

Multiple Choice

What happens when a stop codon is reached by a ribosome?

• A)A termination tRNA^ter binds to the codon and is used to release the growing peptide from the P site tRNA.The ribosome then is likely to dissociate.
• B)A termination tRNA^ter binds to the codon and the growing peptide is transferred to it.When the peptidyl-tRNA^ter reaches the P site,the ribosome is signaled to release the protein.The ribosome then is likely to dissociate.
• C)A termination tRNA^ter binds to the codon and the growing peptide is transferred to it.When the peptidyl-tRNA^ter reaches the P site,the ribosome dissociates.A separate peptidyl transferase then releases the protein from tRNA^ter.
• D)A release factor binds to the codon and is used to release the growing peptide from the P site tRNA.
• E)A release factor binds to the codon and the ribosome dissociates.A separate peptidyl transferase then releases the protein from the last tRNA to which was attached.

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Definitions:

General Adaptation Syndrome

A three-stage response (alarm, resistance, exhaustion) that the body goes through when under stress, as proposed by Hans Selye.

Resistance Phase

The second stage of the general adaptation syndrome, characterized by the body's adaptation to a continuous stressor and an attempt to restore homeostasis.

Minor Frustrations

Small, often daily, annoyances or irritations that can accumulate and affect mood or well-being.

Realistic Optimists

Individuals who maintain a positive outlook on life while still being grounded in reality, acknowledging potential obstacles and planning accordingly.