The nucleotidic sugar is a pentose. Carbons in this pentose are numerated from 1' to 5'. The phosphate group conects to the sugar at 5' carbon.
Nucleotides
Nucleotides are monomers composed of a sugar molecule, joined with a phosphate group and a nitrogenated base.
Sugar group
- DNA sugar group contains deoxyribose, with hydroxyl modifications.
- Sugar is always a pentose.
- Carbons in the pentose are numbered from 1' to 5'.
- The phosphate group attaches to the 5' carbon,
- There is a free -OH in the 3' carbon that forms a 5′–3′ phosphodiester linkage with the following nucleotide.
- The nitrogenated base attaches to the 1' carbon.
The phosphate group conects to the sugar at 5' carbon.
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