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Question

All of the following are pyrimidine bases in the nucleotides, except

A
Cytosine
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B
Thymine
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C
Adenine
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D
Uracil
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Solution

The correct option is C Adenine
The nucleotides of the DNA are phosphoric acid esters of nucleosides. The nucleosides are compounds made up of pentose sugar and nitrogenous bases. The nitrogenous bases are of two types: double ringed purine bases and single ringed pyrimidine bases.
The adenine and guanine are purine bases. The cytosine, thymine and uracil are the pyrimidine bases found in nucleic acids.

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