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Protein that synthesizes DNA

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solomon_pup:
I know this isn't exactly a chemistry question but I was wondering today and forgot, what is the name of the protein that breaks the bonds holding a double helix together and makes copies of it?  And could somebody tell me exactly what the difference between thymine and uracil is?

sdekivit:

--- Quote from: solomon_pup on August 29, 2006, 01:24:20 PM ---what is the name of the protein that breaks the bonds holding a double helix
--- End quote ---

this is helicase


--- Quote from: solomon_pup on August 29, 2006, 01:24:20 PM ---makes copies of it?
--- End quote ---

DNA polymerase (the holoenzyme synthesizes directly behind the replication fork). Then DNA polymerase I is needed to synthesize the Okazaki fragments on the lagging strand.


--- Quote from: solomon_pup on August 29, 2006, 01:24:20 PM ---And could somebody tell me exactly what the difference between thymine and uracil is?

--- End quote ---

search for images of these molecules on google.

Next time post your question in the right subforum: chemical biology

savoy7:
Uracil is usually found in RNA and Thymine is found in DNA

Both are pyrimidines.

Thymine has a methyl group off of the 5th carbon and uracil doesn't.

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