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Nucleotides

The building block of nucleic acids  are called nucleotides. When these nucleotides form extremely long molecules, they are called polynucleotides. A nucleotide is composed of three different molecules:

A phosphate group.

A sugar ( 5 Carbons)

A nitrogenous base.

The sugar is the central component of the nucleotides.


This is excerpts from this book. available online at the link 

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