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There are four nitrogenous bases. A, C, T and G

A and G are Purines

C and T are Pyrimidines.

a useful rhyme to remember this is " Silver is PURe AG" - silver is abbreiviated to AG in the Periodic Table

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14y ago
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8y ago

Adenine and Guanine.
Adenine and Guanine.

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14y ago

Adenine and guanine.

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Q: Which four nitrogenous bases are purines?
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