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PROKARYOTES - MISSING A NUCLEUS
If you're looking to learn about cells with a
nucleus, this is the wrong
place. Prokaryotes do not have an organized
nucleus. Their DNA is kind of floating around the
cell. It's clumped up, but not inside of a
nucleus. If you want to learn about cells with a
nucleus, look for information on eukaryotes.
And, once again, a prokaryote is a single cell or
organisms that does NOT have organized
CAN YOU EXIST WITHOUT A NUCLEUS
You can't, but they can. What can you do
without a nucleus? You can do a whole lot.
Most prokaryotes are bacteria and bacteria
can do amazing things. Although they are very
simple organisms, they are found everywhere
on the planet. Some scientists even think that
they may be found on other planets (maybe
even Mars). Some places you can find
bacteria every day are in your intestines, a cup of natural yogurt, or a bakery.
Prokaryotes are the simplest of simple organisms. Here's the checklist.
(1) Prokaryotes have no organized nucleus. Like we said, the DNA is clumped in
an area but there is no organized nucleus with a membrane.
(2) Prokaryotes do not usually have any organelles. They will probably have
ribosomes inside of their cells, but ribosomes are not technically considered
organelles. No chloroplasts. No mitochondria. No nucleus. Not much at all.
(3) Prokaryotes are very small. Because they don't have all of the normal cell
machinery, they are limited in size. As always in biology, there are exceptions,
but generally, prokaryotes are very small (compared to other cells). Mind you,
compared to a virus they are big, but next to an amoeba, tiny.
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Prokaryotes don't have mitosis or meiosis like other cells. Scientists don't
really have a good way of describing how they duplicate, but it's not through
normal means. Check out the bacteria tutorial to get an idea.…read more