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40s is the smaller subunit of ribosome and 60s is the larger one, when combined together the overlapping between two subunits takes place and surface area decreases so therefore it becomes 80s after joining instead of 90s(40+60=90)

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10y ago
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11y ago

70s for prokaryot but 80s for eukaryot.and meaning of S it is sevedberge.

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before they were small now they are bigger

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They have two parts.Bigger part is 60s and small one is 40s.

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Q: Why does 80s ribosome are written as 60s 40s ribosomes?
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What two things make up ribosomes and are are ribosomes surrounded by membrane like other organelles?

A ribosome is a biological molecule made of ribonucleic acid (RNA) and proteins (ribosomal proteins). A ribosome is made of two pieces (subunits).A typical eukaryotic cell ribosome consists of two subunits named 60S (large subunit) and 40S (small). A prokaryotic cell ribosome is a little smaller but it is made of two subunits, too: a 50S and 30S subunit.No, it isn't surrounded by a membrane as some other organelles are.A ribosome is a biological molecule made of ribonucleic acid (RNA) and proteins (ribosomal proteins).A ribosome is made of two pieces (subunits). A typical eukaryotic cell ribosome consists of two subunits named 60S (large subunit) and 40S (small).A prokaryotic cell ribosome is a little smaller but it is made of two subunits too: a 50S and 30S subunit.No, it isn't surrounded by a membrane as some other organelles are.


What is a ribosome constructed of?


What is the meaning of 70S ribosomes in prokaryotes?

70S refers to the rate of sedimentation of the ribosome in a centrifuge. You can almost think of it as a unit of size. The "S" is a unit of measurement called the Svedberg unit. Ribosomes contain two subunits. In prokaryotes, these subunits are 50S (large) and 30S (small). The total ribosome with both subunits is 70S in prokaryotes. (Notice that 30 + 50 = 80 and not 70. Remember this is not size and the rate of sedimentation is less when the subunits are bound then when they are separated.) Eukaryotic cells have 80S ribosomes: 60S (large) and 40S (small) subunits.


What is the difference between prokaryote and eukaryote Ribosome?

In eukaryotes ribosomes are either free in the cytoplasm or are attached to the outer membrane of endoplasmic reticulum through ribophorins and by larger subunits (60s).In the cytoplasm of eukaryotes ribosomes are 80s ( s: svedberg's unit of sedimentation) type, and have two subunits. The bigger subunit is 60s type and the smaller subunit is of 40s type. Eukaryotes also have 70s ribosomes in mitochondria and chloroplast the furter division of two subunits is as60s: have split proteins and core r-RNA 28s, 5.8s and, 5s40s: corer-RNA of 18s and split proteinIn prokaryotes the ribosomes are only in free forms in the cytoplasm or protoplasm.It is of 70s type in prokaryotes and divided in two subunits as 50s and 30s.50s: split protein and core r-RNA 23s and 5s30s: core r-RNA of 16s and split proteinsEukaryotic ribosomes are much larger then prokaryotic ribosomes.


Are eukaryotic ribsomes composed of 60S and 40S subunits?

Yes they are made up of 60s and 40s sub units.Together they makeup 80s

Related questions

what is the cell found in ribosomes?

ribosomes are not cells, they are organelles that produce and synthesize proteins. get it straight!


What are the parts of the ribosome?

In eukariyotes there are two subunits.60s unit and 40s unit


What are the chemical components of ribosomes are proteins?

A ribosome is a biological molecule made of ribonucleic acid (RNA) and proteins (ribosomal proteins). A ribosome is made of two pieces (subunits). A typical eukaryotic cell ribosome consists of two subunits named 60S (large subunit) and 40S (small). The 60S subunit is made of a 5S RNA (of 120 nucleotides), a 28S RNA (of 4700 nucleotides), a 5.8S subunit (of 160 nucleotides) and around 49 proteins. The 40S subunit, on the contrary, has a 1900 nucleotide (18S) RNA and approximately 33 proteins.


What two things make up ribosomes and are are ribosomes surrounded by membrane like other organelles?

A ribosome is a biological molecule made of ribonucleic acid (RNA) and proteins (ribosomal proteins). A ribosome is made of two pieces (subunits).A typical eukaryotic cell ribosome consists of two subunits named 60S (large subunit) and 40S (small). A prokaryotic cell ribosome is a little smaller but it is made of two subunits, too: a 50S and 30S subunit.No, it isn't surrounded by a membrane as some other organelles are.A ribosome is a biological molecule made of ribonucleic acid (RNA) and proteins (ribosomal proteins).A ribosome is made of two pieces (subunits). A typical eukaryotic cell ribosome consists of two subunits named 60S (large subunit) and 40S (small).A prokaryotic cell ribosome is a little smaller but it is made of two subunits too: a 50S and 30S subunit.No, it isn't surrounded by a membrane as some other organelles are.


What is a ribosome constructed of?


What is the meaning of 70S ribosomes in prokaryotes?

70S refers to the rate of sedimentation of the ribosome in a centrifuge. You can almost think of it as a unit of size. The "S" is a unit of measurement called the Svedberg unit. Ribosomes contain two subunits. In prokaryotes, these subunits are 50S (large) and 30S (small). The total ribosome with both subunits is 70S in prokaryotes. (Notice that 30 + 50 = 80 and not 70. Remember this is not size and the rate of sedimentation is less when the subunits are bound then when they are separated.) Eukaryotic cells have 80S ribosomes: 60S (large) and 40S (small) subunits.


What is 70s ribosomes?

70S refers to the rate of sedimentation of the ribosome in a centrifuge. You can almost think of it as a unit of size. The "S" is a unit of measurement called the Svedberg unit. Ribosomes contain two subunits. In prokaryotes, these subunits are 50S (large) and 30S (small). The total ribosome with both subunits is 70S in prokaryotes. (Notice that 30 + 50 = 80 and not 70. Remember this is not size and the rate of sedimentation is less when the subunits are bound then when they are separated.) Eukaryotic cells have 80S ribosomes: 60S (large) and 40S (small) subunits.


Where must An MRNA Attach Before Protein Can Begin?

The ribosome.


What is the difference between prokaryote and eukaryote Ribosome?

In eukaryotes ribosomes are either free in the cytoplasm or are attached to the outer membrane of endoplasmic reticulum through ribophorins and by larger subunits (60s).In the cytoplasm of eukaryotes ribosomes are 80s ( s: svedberg's unit of sedimentation) type, and have two subunits. The bigger subunit is 60s type and the smaller subunit is of 40s type. Eukaryotes also have 70s ribosomes in mitochondria and chloroplast the furter division of two subunits is as60s: have split proteins and core r-RNA 28s, 5.8s and, 5s40s: corer-RNA of 18s and split proteinIn prokaryotes the ribosomes are only in free forms in the cytoplasm or protoplasm.It is of 70s type in prokaryotes and divided in two subunits as 50s and 30s.50s: split protein and core r-RNA 23s and 5s30s: core r-RNA of 16s and split proteinsEukaryotic ribosomes are much larger then prokaryotic ribosomes.


What age is midlife?

40s - 60s


Are eukaryotic ribsomes composed of 60S and 40S subunits?

Yes they are made up of 60s and 40s sub units.Together they makeup 80s


Why 80s equals 60s plus 40s written?

Possibly because someone cannot add properly.