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  4. Which one of the following pair of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?

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Q. Which one of the following pair of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?

BHUBHU 2010

Solution:

DNA and RNA, the principal genetic materials of living organisms are chemically called nucleic acids. These are polymers of nucleotides. Each nucleotide is composed of phosphoric acid, pentose sugar and nitrogenous base. The nitrogenous bases are of two type, ie, purine and pyrimidines. Purines are heterocyclic and two rings compound, cg, adenine, guanine. Pyrimidines are single ring compound, eg, thymine, cytosine, uracil.