Group: sci.bio.evolution · Group Profile
Author: Tim TylerTim Tyler Date: Aug 10, 2008 11:23
Devils Advocaat wrote:
> On 8 Aug, 17:37, Tim Tyler googlemail.com> wrote:>> Primed isochiral nucleotides and test tubes are both biotic: without
>> life, there's no DNA.
>
> Can you provided supporting evidence for this assertion?
See Chapter 1 of Genetic Takeover (1988), paying special attention
to the 20 problems in the section entitled:
"The implausibilty of prevital nucleic acid"
....starting on page 56.
>> DNA - however formed - breaks down over a period of years by splitting
>> up, at a rate which depends on the temperature. With a long enough
>> molecule, the average time to the first break could be made to be five minutes.
>> Is that what you are after?
>
> No, sorry, but it isn't, as you haven't really answered my question.
"Can anyone tell me if a DNA strand ... has a length limit before
it becomes unstable?"
No, it doesn't. Once formed, DNA is normally a very stable molecule -
that's one of the reasons it is used in biological systems. It does
have a probabilties of undergoing damage - strand breaks,
depurination,
deamination, etc - which depend on temperature, radiation flux and
other factors - and the longer you make a strand, the more likely
it is that it will be damaged, because the more places there are
for damage to happen.
Maybe you wanted to know about the problems in making long
DNA strands with current technology in the first place?
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