题目内容

The elongation factor EF-G is responsible for the loading of aminoacyl-tRNA into A site.()

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After the synthesis of polypeptide is completed, the release of synthetic peptides relys on the protein release factors,while the release of mRNA,ribosome subunits and tRNA requires ribosome recycling factors.()

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The start codon is methionine in prokaryotes, so the initiator amino acid is always methionine or formylated methionine.()

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Which of the following factors is responsible for the termination of protein biosynthesis:()

A. RRF
B. RF
C. EF
D. IF

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When translation is not performed by ribosome, both the large subunit and the small subunit of ribosome are free, and it mainly depends on:()

A. The small subunit of ribosome could not bind to the large subunit when mRNA is not interacted with the small subunit.
B. The binding of small subunit to translation initiation factor 3(IF-3) prevents the combination of small subunit and larger subunit.
C. The small subunit of ribosome is not connected to the initiator tRNA,which is the bridge that promotes the combination of large subunit and small subunit.
D. Lack of necessary translation initiation factors in the small subunit,thus not able to combine with the large subunit.

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