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The ribosome from the eukaryotic and prokaryotic cells was isolated. Which of the ribosome will sediment faster?
Eukaryotic
Prokaryotic
Both will sentiment at the same time
Can’t say
Answers (1)
Eukaryotic ribosomes are also known as 80S ribosomes due to their quicker sedimentation coefficients in Svedberg units than prokaryotic (70S) ribosomes. Hence option (A) is correct.
Option (B) is incorrect because ribosomes are connected with the cell's plasma membrane in prokaryotes. They measure around 15 nm by 20 nm and are composed of two subunits: 50S and 30S units, which when combined create 70S bacterial ribosomes. Hence prokaryotic ribosome sediment slower than eukaryotic ribosome.
Option (C) is incorrect because the distinction between 70s and 80s ribosomes is mostly due to sedimentation rate and the fact that 70s ribosomes are present in prokaryotes whereas 80s ribosomes are found in eukaryotes. The 70s ribosomes are smaller and lighter than the 80s ribosomes.
Option (D) is incorrect because the Svedberg unit is officially a measure of time (1013 s), it also provides a measurement of particle size, density, and shape, all of which contribute to sedimentation behaviour. Larger particles tend to sediment quicker and so have greater Svedberg values, everything else being equal.
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