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Questions and Answers
Which of the following is a major difference between prokaryotic and eukaryotic ribosomes?
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?
What is the sedimentation coefficient for eukaryotic ribosomes?
- 70S
- $50S$
- $40S$
- $80S$ (correct)
- $60S$
Where are eukaryotic ribosomes mostly attached?
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?
What is the diameter of prokaryotic ribosomes?
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What is the mass of eukaryotic ribosomes?
What is the mass of eukaryotic ribosomes?
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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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