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Do all living cells contain ribosomes ?
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I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
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#2
(Original post by Leah.J)
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
So I believe your lecturer is wrong as ribosomes are necessary for protein synthesis (creating genetic material etc.) Therefore, all living things would need ribosomes.
Edit: excluding mature red blood cells
Because protein synthesis is an essential function of all cells, ribosomes are found in practically every cell type of multicellular organisms, as well as in prokaryotes such as bacteria. However, eukaryotic cells that specialize in producing proteins have particularly large numbers of ribosomes. - Khan Academy
Last edited by _Mia101; 1 year ago
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#3
(Original post by Leah.J)
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
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#4
(Original post by Leah.J)
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
Last edited by mgi; 1 year ago
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#5
(Original post by Leah.J)
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
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#6
(Original post by mgi)
Your lecturer is correct. Bacteria are living but do not have ribosomes.
Your lecturer is correct. Bacteria are living but do not have ribosomes.
pretty much all living cells have ribosomes except for red blood cells, but these are a bit of a special case and also don't contain a nucleus, so this also technically makes your lecturer incorrect when they said every living cell contains genetic material. but RBCs are a rare exception, generally it's fine to say all cells except RBCs contain genetic material, a cell membrane, cytoplasm and ribosomes.
*S = Svedberg units, relating to how a molecule diffuses through solution - don't worry about it, all you need to know is 80S is bigger than 70S.
source: biochemistry degree
Last edited by lucymellor; 1 year ago
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#7
(Original post by lucymellor)
this isn't true. bacteria have ribosomes as they need to produce proteins just as much as eukaryotes do. the prokaryotic ribosome is smaller (70S*) than the eukaryotic ribosome (80S) and functions fairly similarly with some differences in translation factors and other things. most of what we know about translation is from studying the prokaryotic ribosome since it's simpler.
pretty much all living cells have ribosomes except for red blood cells, but these are a bit of a special case and also don't contain a nucleus, so this also technically makes your lecturer incorrect when they said every living cell contains genetic material. but RBCs are a rare exception, generally it's fine to say all cells except RBCs contain genetic material, a cell membrane, cytoplasm and ribosomes.
*S = Svedberg units, relating to how a molecule diffuses through solution - don't worry about it, all you need to know is 80S is bigger than 70S.
source: biochemistry degree
this isn't true. bacteria have ribosomes as they need to produce proteins just as much as eukaryotes do. the prokaryotic ribosome is smaller (70S*) than the eukaryotic ribosome (80S) and functions fairly similarly with some differences in translation factors and other things. most of what we know about translation is from studying the prokaryotic ribosome since it's simpler.
pretty much all living cells have ribosomes except for red blood cells, but these are a bit of a special case and also don't contain a nucleus, so this also technically makes your lecturer incorrect when they said every living cell contains genetic material. but RBCs are a rare exception, generally it's fine to say all cells except RBCs contain genetic material, a cell membrane, cytoplasm and ribosomes.
*S = Svedberg units, relating to how a molecule diffuses through solution - don't worry about it, all you need to know is 80S is bigger than 70S.
source: biochemistry degree
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#8
(Original post by mgi)
Sorry. You are right. I did change my first post but clearly it didnt get through in time to replace the wrong post!
Sorry. You are right. I did change my first post but clearly it didnt get through in time to replace the wrong post!
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#9
(Original post by Leah.J)
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
I’m asking because my book says yes but my lecturer said the only 3 things that every single living cell has is the cell membrane, some sort of chromosome or genetic material and cytoplasm
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