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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.