Which of the following factors is responsible for the termination of protein biosynthesis:()
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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.
Which of the following is not needed in the elongation process of polypeptide chain:()
A. mRNA
B. formyl-methionyl-tRNA
C. transpeptidase
D. GTP
EF-Tu and EF-Ts
In biosynthesis of protein, which of the following would be consumed besides ATP:()
A. CTP
B. UTP
C. GTP
D. ADP
The initiation of translation contains three steps in prokaryotic cells, so which of the following step does not belong to these three steps:()
A. The small subunit of ribosome firstly recognizes and binds to the methylated 5' end of template mRNA.
B. The initiator aminoacyl-tRNA is inserted into P site of the ribosome small subunit to form the initiation complex.
C. Small subunit recognizes and binds to mRNA at ribosomal binding site (also known as SD sequence).
D. Large subunit binds to the initiation complex to form a complete ribosome.
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