The Ultimate Quiz on Peptide Bond Formation and Translocation in Translation
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Questions and Answers

What is the function of EF-Ts in protein translation?

  • It binds to the A-site of the ribosome
  • It catalyzes translocation
  • It regenerates EF-Tu-GTP (correct)
  • It catalyzes peptide bond formation

    • What is the catalytic component of the ribosome responsible for peptide bond formation?

  • rRNA
  • PT ribozyme (correct)
  • Translocase
  • EF-Tu

    • Which subunit of the ribosome contains the PT ribozyme in bacteria?

  • 30s subunit
  • 80s subunit
  • 70s subunit
  • 50s subunit (correct)

    • What is the function of translocase in protein translation?

    <p>It catalyzes translocation</p> Signup and view all the answers

    What is the role of EF-Tu in protein translation?

    <p>It delivers aminoacyl-tRNA to the ribosome</p> Signup and view all the answers

    Which site on the ribosome does the peptidyl tRNA move to during translocation?

    <p>P-site</p> Signup and view all the answers

    Which site on the ribosome does the free tRNA move to during translocation?

    <p>E-site</p> Signup and view all the answers

    What is the effect of an antibiotic that inhibits translocation?

    <p>It prematurely terminates translation</p> Signup and view all the answers

    What is the energy source for translocation during protein translation?

    <p>GTP</p> Signup and view all the answers

    What is the function of EF-Ts in the regeneration of EF-Tu-GTP?

    <p>It replaces GDP with GTP on EF-Tu</p> Signup and view all the answers

    What is the function of EF-Ts in protein translation?

    <p>It regenerates EF-Tu-GTP</p> Signup and view all the answers

    What is the catalytic component of the ribosome responsible for peptide bond formation?

    <p>PT ribozyme</p> Signup and view all the answers

    Which subunit of the ribosome contains the PT ribozyme in bacteria?

    <p>50s subunit</p> Signup and view all the answers

    What is the function of translocase in protein translation?

    <p>It catalyzes translocation</p> Signup and view all the answers

    What is the role of EF-Tu in protein translation?

    <p>It delivers aminoacyl-tRNA to the ribosome</p> Signup and view all the answers

    Which site on the ribosome does the peptidyl tRNA move to during translocation?

    <p>P-site</p> Signup and view all the answers

    Which site on the ribosome does the free tRNA move to during translocation?

    <p>E-site</p> Signup and view all the answers

    What is the effect of an antibiotic that inhibits translocation?

    <p>It prematurely terminates translation</p> Signup and view all the answers

    What is the energy source for translocation during protein translation?

    <p>GTP</p> Signup and view all the answers

    What is the function of EF-Ts in the regeneration of EF-Tu-GTP?

    <p>It replaces GDP with GTP on EF-Tu</p> Signup and view all the answers

    What is the function of EF-Ts?

    <p>It regenerates EF-Tu-GTP</p> Signup and view all the answers

    Which site is responsible for peptide bond formation?

    <p>A-site</p> Signup and view all the answers

    What is the function of peptidyl transferase (PT)?

    <p>It catalyzes peptide bond formation</p> Signup and view all the answers

    What is the ribozyme responsible for catalyzing peptide bond formation in bacteria?

    <p>23s rRNA of 50s subunit</p> Signup and view all the answers

    What is the ribozyme responsible for catalyzing peptide bond formation in eukaryotes?

    <p>28s rRNA in 60s subunit</p> Signup and view all the answers

    What is the function of translocase?

    <p>It catalyzes translocation</p> Signup and view all the answers

    Which tRNA site is responsible for holding the growing polypeptide chain?

    <p>P-site</p> Signup and view all the answers

    Which tRNA site is responsible for holding the next amino acid to be added to the polypeptide chain?

    <p>A-site</p> Signup and view all the answers

    What happens to the free tRNA after translocation?

    <p>It moves to the 'E-site' and exits</p> Signup and view all the answers

    What is the consequence of an antibiotic inhibiting translocation?

    <p>It inhibits EF-Ts</p> Signup and view all the answers

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