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Thymine in spite of uracil.

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Thymine in spite of uracil.

Postby muffy » Mon Jul 11, 2005 9:23 pm

hii! :D
it was a question that my teacher put it in a exam:
(it souds strange... anyway... :? )

related with the repairs' mechanisms of DNA, why thre´s Thymine in spite of uracil :?: :?: :?:

THKSS!
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Re: Thymine in spite of uracil................

Postby zami'87. » Tue Jul 12, 2005 2:09 am

muffy wrote:hii! :D
it was a question that my teacher put it in a exam:
(it souds strange... anyway... :? )

related with the repairs' mechanisms of DNA, why thre´s Thymine in spite of uracil :?: :?: :?:

THKSS!

in DNA nucleotides: Adenine,Guanine,Cytosine,Thymine and in RNA also A,G,C but instead of thymine is uracil(U). Seems ok question to me if I understood u correctly. If pairing is wrong it should be corrected by repair mechanism. :?
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Postby victor » Tue Jul 12, 2005 12:36 pm

I don't think that U can be found in the DNA... :?
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Postby chemistry_freako » Tue Jul 12, 2005 3:25 pm

Yea - uracil's unqiue to RNA, complementary to adenine
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Postby canalon » Tue Jul 12, 2005 5:05 pm

victor wrote:I don't think that U can be found in the DNA... :?


Uracil can be the product of Cytosine deamination, hence they can be spontaneously formed, and produce mutation. But glycosylase are enzymes which are specially designed to repair this kind of mismatch.

HTH

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Postby muffy » Wed Jul 13, 2005 9:05 am

Uracil can be the product of Cytosine deamination, hence they can be spontaneously formed, and produce mutation. But glycosylase are enzymes which are specially designed to repair this kind of mismatch.

HTH

Patrick[/quote]

thks for the answer! :D
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Postby victor » Thu Jul 14, 2005 12:40 pm

Hey..btw, have you heard about strange unusual nitrogenous base name Hydroxymethylcytosine?? I think that N.base located in the bacteria chromosome..
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