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cells

Postby meg » Thu Feb 17, 2005 1:44 am

i don't understand the difference between prokaryotic cells and eukaryotic cells
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Postby biostudent84 » Thu Feb 17, 2005 2:03 am

Prokaryotic cells were the first cells. They are much smaller, and are only found in the Kingdom Monera. They have no organelles, no nucleus, and their DNA is circular.

Eukaryotic cells came later. They are gigantic compared to the Prokaryotic cell. They are found the rest of the kingdoms (Anamalia, Plantae, Fungi, and Protista). They have organelles, a nucleus, and their DNA is linear.
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Postby thank.darwin » Thu Feb 17, 2005 2:04 am

Prokaryotic cells only have a cell membrane, DNA, ribosomes, and cytoplasm. eukaryotic cells are compartmentalized and have other organelles and their DNA is all stored in a central "command center" for the cell; the nucleus.

Does that help?
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Postby thank.darwin » Thu Feb 17, 2005 2:06 am

biostudent84 wrote: They have no organelles


They had a cell membrane, ribosomes, and cytoplasm... those are organelles.
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Postby Poison » Thu Feb 17, 2005 4:21 pm

I think this explanation is more clear:
They have no membrane bound organelles.
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Postby biomajor » Fri Feb 18, 2005 7:58 pm

a simple way to tell the difference is that prokaryotic cells are single celled and eucaryotic means that it's mult icelled
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Postby mith » Fri Feb 18, 2005 8:19 pm

That's wrong. Eukaryotic only means has a nucleus.
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Postby thank.darwin » Fri Feb 18, 2005 8:35 pm

biomajor wrote:a simple way to tell the difference is that prokaryotic cells are single celled and eucaryotic means that it's mult icelled


Most multicellular organisms are made up of eukaryotic cells.... Most Prokaryotic organisms are really small or are only one cell organisms.
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Postby meg » Fri Feb 25, 2005 3:20 am

yes, THANKS, that helped a lot.
but i'm still a little bit confuse about the part about "prokaryotic cells are single celled and eucaryotic means that it's mult icelled". is that right or wrong?
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Postby biostudent84 » Fri Feb 25, 2005 3:35 am

Semi-correct. All prokaryotic cells are unicellular organisms. Eukaryotic cells can either be unicelluler (Ameba), or multicellular (Humans).

Kyle

P.S. Yes, I DID spell Ameba right..."Ameoba" is the British way of spelling it ;)
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Postby MrMistery » Sat Mar 05, 2005 10:17 pm

In my bio book it is spelled "Amoeba" so i guess it is correct anyway...
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Postby Tina Hakola » Tue Mar 08, 2005 3:43 am

The Eukaryotic are highly structured and are larger then the cell of bacteria. They have also developed a specialized packaging and transport mechanisms that may be necessary to support their larger size. These also have specialized compartments (membrane-bound organelles). The prefix eu-means true.

The Prokaryotic is simple in structure, with no recognizable organelles. They have an outer cell wall that gives them shape. Just under the rigid cell wall is the more fluid cell membrane. The cytoplasm enclosed within the cell membrane does not exhibit much structure when viewed by electron microscopy. These lack membrane-bound organelles. Prokaryotic means before having nucleus.
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