In eukaryotes, which factor is involved in ribosome recycling?

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Multiple Choice

In eukaryotes, which factor is involved in ribosome recycling?

Explanation:
The key idea here is how ribosomes are split apart after a protein is released, so they can be reused in eukaryotes. ABCE1 acts as the ribosome recycling factor in this context. It’s an ATPase that associates with the ribosome after termination and, powered by ATP hydrolysis, drives the separation of the 80S ribosome into the 40S and 60S subunits. This recycling step frees the mRNA and the tRNA so the ribosomal subunits can participate in new rounds of initiation. EF-Tu is involved in bringing aminoacyl-tRNAs during elongation, not in post-termination splitting. RF1 is a bacterial release factor that promotes peptide release at stop codons, but it’s part of the prokaryotic system, not the eukaryotic one. RRF is the bacterial ribosome recycling factor that works with EF-G to split the ribosome after termination; in eukaryotes, ABCE1 plays the analogous recycling role.

The key idea here is how ribosomes are split apart after a protein is released, so they can be reused in eukaryotes. ABCE1 acts as the ribosome recycling factor in this context. It’s an ATPase that associates with the ribosome after termination and, powered by ATP hydrolysis, drives the separation of the 80S ribosome into the 40S and 60S subunits. This recycling step frees the mRNA and the tRNA so the ribosomal subunits can participate in new rounds of initiation.

EF-Tu is involved in bringing aminoacyl-tRNAs during elongation, not in post-termination splitting. RF1 is a bacterial release factor that promotes peptide release at stop codons, but it’s part of the prokaryotic system, not the eukaryotic one. RRF is the bacterial ribosome recycling factor that works with EF-G to split the ribosome after termination; in eukaryotes, ABCE1 plays the analogous recycling role.

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