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Question

Phosphodiester bond is present in

A
Nucleic acid
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B
polysaccharides
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C
Polypeptides
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D
Diglycerides
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Solution

The correct option is A Nucleic acid
The polymerization of the nucleotides is known as a condensation reaction. The condensation reaction occurs between 3' OH of the first nucleotide and 5' phosphate of the incoming nucleotide; with the elimination of the water molecule an ester bond is formed (Phosphoester bond). There are two phosphoester bonds present between the two nucleotides which is known as a phosphodiester bond. Phosphoesters are most commonly found in the body as phosphodiesters, meaning that instead of one of the alcohol groups, there is another O-R bond. Phosphodiesters are the bonds that link bases together to form nucleic acids (DNA and RNA).

Glycosidic bonds are present in the polysaccharides.
Peptides bonds are present in polypeptides.

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