Letter N

Nucleotide

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>A nitrogenous base (A, G, T, or C in DNA; A, G, U, or C in RNA), >A phosphate molecule, and >A sugar molecule (deoxyribose in DNA and ribose in RNA).

</LI></OL> A DNA oligonucleotide is a short piece of DNA composed of relatively few (oligo-) nucleotide bases.

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