Nucleotides are linked by

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(B) Nucleotides consist of three components: a nitrogenous base,a pentose sugar,and a phosphate group.In a polynucleotide chain,the phosphate group of

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phosphodiester bonds.

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(B) Nucleotides consist of three components: a nitrogenous base,a pentose sugar,and a phosphate group.In a polynucleotide chain,the phosphate group of one nucleotide is linked to the $3'$-carbon of the pentose sugar of the adjacent nucleotide by a phosphodiester bond.This bond formation involves the $5'$-phosphate group of one nucleotide and the $3'$-hydroxyl group of the next,creating the sugar-phosphate backbone of the $DNA$ or $RNA$ molecule.

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