Which of the following best describes what happens when an 80S ribosome completes synthesis of a protein?
A) the entire ribosome is degraded by proteases and nucleases
B) the protein components of the ribosome are degraded by the proteasome, but the rRNAs are recycled
C) the ribosome dissociates into 60S and 40S subunits, which are then available for another round of protein synthesis
D) the 80S ribosome stays intact and is available for initiating another round of protein synthesis
E) the RNA components of the ribosome are degraded by nucleases, but the proteins are recycled

Question

Quizplus · Accepted Answer

The 80S ribosome dissociates into its 60S and 40S subunits after completing protein synthesis, allowing these subunits to be reused in future rounds of translation. Translation termination occurs when a stop codon is encountered within the context of the A-site of the 60S subunit. The termination factor eRF stimulates the peptidyltransferase ribozyme to transfer the peptide to H₂O. The peptide is released from the ribosome along with the naked tRNA and mRNA. The antiassociation factors then promote dissociation of the 80S ribosome into its 2 ribosomal subunits so the process can begin anew.

Which of the Following Best Describes What Happens When an 80S