Which of the following bases is bicyclic?

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(A) Nitrogenous bases are classified into two types: purines and pyrimidines.Purines are bicyclic structures (a six-membered ring fused to a five-memb

Vedclass · Accepted Answer

Guanine

Vedclass · Answer

(A) Nitrogenous bases are classified into two types: purines and pyrimidines.Purines are bicyclic structures (a six-membered ring fused to a five-membered ring).Pyrimidines are monocyclic structures (a single six-membered ring).Among the given options,$Guanine$ and $Adenine$ are purines (bicyclic).$Thymine$,$Uracil$,and $Cytosine$ are pyrimidines (monocyclic).Therefore,$Guanine$ is the correct answer.

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