Pentose Sugar of DNA, Sugar Component of Nucleotide is Pentose, 2 Deoxyribose Base, Haworth Structure, Standard Ribose Structure, Carbonyl Group

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	Pentose Sugar of DNA - In DNA, the sugar component of the nucleotide is a pentose called 2 '-deoxyribose base. Pentose sugars contain five carbon atoms and can exist in two forms (i) straight chain or Fischer structure and (ii) the ring or Haworth structure. In DNA, pentose sugar exists in ring form and is 2-deoxyribose type.
The name 2-deoxyribose indicates that the standard ribose structure has been altered by replacement of the hydroxyl group (-OH) attached to carbon atom number 2' with a hydrogen group (-H). The carbon atoms are always numbered in the same way with the carbon of the carbonyl group (-C=O), occurring at one end of the chain form numbered 1. It is important to remember the numbering of the carbons because it is used to indicate at which positions on the sugar other components of the nucleotide are attached.