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Which of the following events occurs during translocation? A) The peptidyl-tRNA moves from the A site to the P site B) The ribosome moves one codon along mRNA so that a new codon is positioned in the A site C) The empty tRNA moves from the P site to the E site and then leaves the ribosome D) All of the above

Question

Which of the following events occurs during translocation? A) The peptidyl-tRNA moves from the A site to the P site B) The ribosome moves one codon along mRNA so that a new codon is positioned in the A site C) The empty tRNA moves from the P site to the E site and then leaves the ribosome D) All of the above

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Solution

D) All of the above

During translocation in protein synthesis, all of the events listed occur.

A) The peptidyl-tRNA moves from the A site to the P site: This is the first step of translocation. The tRNA that was in the A site, carrying the growing peptide chain, moves to the P site.

B) The ribosome moves one codon along mRNA so that a new codon is positioned in the A site: After the peptidyl-tRNA moves to the P site, the ribosome shifts along the mRNA by one codon. This brings a new codon into the A site, ready for the next round of protein synthesis.

C) The empty tRNA moves from the P site to the E site and then leaves the ribosome: The tRNA that was in the P site, now without an amino acid, moves to the E site before exiting the ribosome. This makes room for the next tRNA molecule to enter the A site.

So, the correct answer is D) All of the above.

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Similar Questions

During the process of translation:Select one:a. The incoming tRNA must first bind to the E siteb. Initiation begins with the binding of the ribosomal larger subunit to the polyA tail of the mRNAc. The peptide is passed from tRNA in the P site to the tRNA at the A sited. The mRNA is translated by one ribosome at a time

During the mRNA translation, in what site of the ribosome binds the incoming tRNA molecule carrying the amino acid that will be added to the growing polypeptide chain? Z-site E-site W-site P-site A-site

Which of the following steps is part of the elongation cycle in translation? A) Aminoacyl-tRNA binding B) Transpeptidation reaction C) Translocation D) All of the above

During the process of translation, the growing polypeptide chain is released from the ribosome when:Select one:a. The 7-methylguanosine cap is reachedb. A chain terminating tRNA binds to the ribosomec. The poly A tail is reachedd. A chain terminating codon is reached

Which of the following statements best describes a translocation?Shifting of a part of a chromosome to another non-homologous chromosomeShifting of a chromosome to another chromosomeShifting of a part of a chromosome to another homologous chromosomeShifting of part of chromosomes to the outside membrane of the nucleus

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