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Question
Which nitrogenous bases are classified as purines?
Options
Adenine and Uracil
Cytosine and Thymine
Guanine and Cytosine
Adenine and Guanine
MCQ
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Solution
Adenine and Guanine are the two purine bases, characterized by their double-ring structure. Both are found in DNA and RNA. Purines are larger than pyrimidines and are essential components of the genetic code in all nucleic acids.
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