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DNA/RNA nucleotides question

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DNA/RNA nucleotides question

Postby thewax » Sun Dec 14, 2008 6:35 am

I read somewhere that the RNA nucleotides (that are used in transcription) in eukaryotic cells are found in the nucleus. So where are the DNA nucleotides (used for DNA replication) found? And how do they get there (both RNA and DNA nucleotides) - or are they just recycled?
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Postby MrMistery » Sun Dec 14, 2008 3:30 pm

both are in the nucleus.
as for how they get there: nuclear pores
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Postby ChanSTAH » Thu Jan 08, 2009 11:14 am

they are both located in the nucleus in the cell. :D
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Re: DNA/RNA nucleotides question

Postby Syne » Tue Jan 13, 2009 11:25 pm

Well first of all, most RNA is found in the cytoplasm, though it's made in the nucleus. Transcription occurs in the nucleus but translation (which is what turns RNA into polypeptide chains) occurs outside the nucleus. So once enzymes are done cutting the RNA into usable codons, the RNA gets spit out of the nucleus into the cytoplasm where it's then translated by ribosomes.

The reason there's so much RNA floating around in cytoplasm is because it needs to exist in order for random interactions to occur. There's nothing to tell the RNA, "Hey go bind with that ribosome" so it floats around until it happens across a ribosome that can translate it into a string of amino acids (aka. polypeptide chain)

Hope this helps.
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