Which statement is true?

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Question

(A) Nucleotides consist of carbon,hydrogen,oxygen,nitrogen,and phosphorus.Nitrogenous bases are classified as purines or pyrimidines.Purines (Adenine

Vedclass · Accepted Answer

Adenine has $4$ nitrogen atoms.

Vedclass · Answer

(A) Nucleotides consist of carbon,hydrogen,oxygen,nitrogen,and phosphorus.Nitrogenous bases are classified as purines or pyrimidines.Purines (Adenine and Guanine) are $9$-membered double-ringed structures containing $4$ nitrogen atoms.Pyrimidines (Cytosine,Thymine,and Uracil) are single-ringed structures.Specifically,Cytosine has $3$ nitrogen atoms,while Uracil and Thymine have $2$ nitrogen atoms.Therefore,the statement that Adenine has $4$ nitrogen atoms is correct.

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