Correction on Re: How animals in the hydrothermal vent can live with the high temperature.

LIzz Hancock vbow6161 at ou.edu
Wed Mar 13 22:44:48 EST 2002


Oops!  Sorry- I just got done from taking my Biochemistry midterm, and I
crammed all night for it ( I was too tired to drive so I walked home from my
exam!)

 Guanine and Cytosine are nucleic acids, not amino acids, so they only
affect the stability of the DNA.

Hemophilic does not mean heat loving, thermophilic does- I think my spell
checker did that one.

I'm really sorry!  I should not handle heavy machinery or answer email when
I am so tired!

Lizz

"LIzz Hancock" <vbow6161 at ou.edu> wrote in message
news:sIPj8.2552$c4.101880207 at ounews.ou.edu...
> Their DNA/RNA/Proteins have a higher GC ratio.  This means that the amino
> acids Guanine and Cytosine are present in much greater numbers.  How does
> this help?  It helps because these two amino acids, which bond to each
> other, have 3 bonds between them--this means it's much stronger a bond, so
> they are able to withstand much higher temperatures (i.e., their proteins
> don't fall apart).  The most hemophilic (heat loving) archae (primitive
> bacteria) I can think of can live at 110 degrees Celsius.
>
> These little buggers also fight crime too!  How you ask?  Their heat
> tolerant enzymes are used in the crime lab procedure called PCR.  This
> process takes a very small piece of DNA, too small to test, and makes tons
> of identical copies--enough for the police to test it.
>
> Lizz Hancock
> Microbiology Senior
>
> "Remond" <cpc272688 at yahoo.com> wrote in message
> news:890c20f2.0203090333.397c9a64 at posting.google.com...
> > When someone know that the temperature in a hydrothermal vent can
> > reach 400 degrees Celsius, he will think that this place(hydrothermal
> > vent) is not a good place for life. But after many years of search,
> > many scientists prove the existence of many forms of life live around
> > these vents by using the submersible Alvin. The question is: How these
> > forms of life can stand with this extreme temperature?
> >
> > Thanks...
> >
>
>





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