Which of the following is a purine nitrogenou | vedclass

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(A) Nitrogenous bases in $DNA$ and $RNA$ are classified into two types: purines and pyrimidines.Purines are double-ring structures,which include Adeni

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Adenine

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(A) Nitrogenous bases in $DNA$ and $RNA$ are classified into two types: purines and pyrimidines.Purines are double-ring structures,which include Adenine $(A)$ and Guanine $(G)$.Pyrimidines are single-ring structures,which include Cytosine $(C)$,Thymine $(T)$,and Uracil $(U)$.Therefore,among the given options,Adenine is a purine.

Which of the following is a purine nitrogenous base?

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