In the structure of DNA,if a purine base is p | vedclass

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Question

(A) According to the base-pairing rules established by $Chargaff$,purines always pair with pyrimidines in a $DNA$ double helix.Specifically,$Adenine$

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Pyrimidine

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(A) According to the base-pairing rules established by $Chargaff$,purines always pair with pyrimidines in a $DNA$ double helix.Specifically,$Adenine$ $(A)$ pairs with $Thymine$ $(T)$,and $Guanine$ $(G)$ pairs with $Cytosine$ $(C)$.Since $Adenine$ and $Guanine$ are purines,they must pair with a pyrimidine ($Thymine$ or $Cytosine$) to maintain the constant width of the $DNA$ molecule.Therefore,a purine base always pairs with a pyrimidine base.

In the structure of $DNA$,if a purine base is present on one nucleotide strand,which nitrogenous base pairs with it?

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