Length of Human DNA.
dj_dirk at bigfoot.de
Tue Dec 2 11:42:26 EST 1997
Ivan Moller schrieb:
> > How many nucleotides are in human DNA?
> > And, is the number of nucleotides in human DNA constant across
> > Is that number close? 6 billion? Or are there much more or much
> > I read in a book that there were 200,000 genes in human DNA, and it
> > 1000 nucleotides per gene, which has to be an approximation, right?
> > nucleotides gives you an amino acid, wouldn't the number of
> in a
> > gene have to be evenly divisible by 3?
> > But by that calculation, 200 million base pairs approximately in a
> > DNA?
> The correct size of the human genome is 2.8 bilion base pairs (two
> Your calculation assumes that the DNA only consists of genes, like
> a string, which is not correct.
> Yes, the number of base pairs that encodes the protein is divisible by
> > How do we know that introns are non functional? Introns exist within
> > gene, right?
> All we know is that they don't encode the final protein, as they are
> spliced out of the messenger RNA, than encodes the protein.
> > Not junk outside of start and stop codons, right?
> No, it's inside the start and stop codon.
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