Protein Synthesis Inhibitors Quiz
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Questions and Answers

Which of the following is a major difference between prokaryotic and eukaryotic ribosomes?

  • Sedimentation coefficient
  • Composition of ribonucleoproteins (correct)
  • Occurrence in bacteria and archaea
  • Mass
  • Presence in animals, plants, fungi, and unicellular eukaryotes
  • What is the sedimentation coefficient for eukaryotic ribosomes?

  • 70S
  • $50S$
  • $40S$
  • $80S$ (correct)
  • $60S$
  • Where are eukaryotic ribosomes mostly attached?

  • Outer surface of nucleus and endoplasmic reticulum (correct)
  • Free in cytosol
  • Attached to the Golgi apparatus
  • Attached to the mitochondria
  • Attached to the inner nuclear membrane
  • What is the diameter of prokaryotic ribosomes?

    <p>$200 Å$</p> Signup and view all the answers

    What is the mass of eukaryotic ribosomes?

    <p>$42000 kd$</p> Signup and view all the answers

    Study Notes

    Ribosome Differences

    • Prokaryotic ribosomes are smaller than eukaryotic ribosomes.
    • Prokaryotic ribosomes have a sedimentation coefficient of 70S, while eukaryotic ribosomes have a sedimentation coefficient of 80S.
    • Eukaryotic ribosomes are mostly attached to the endoplasmic reticulum.
    • Prokaryotic ribosomes have a diameter of approximately 25 nm.
    • Eukaryotic ribosomes have a mass of approximately 4.2 MDa.

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    Description

    Test your knowledge of antibiotics that disrupt protein synthesis in cells and their mechanism of action. Learn about how selective toxicity is achieved by targeting differences in prokaryotic and eukaryotic ribosome structures.

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