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  • Which of the following bonds is present in a polynucleotide?Option: 1 Phosphoester bondOption: 2</stron

Which of the following bonds is present in a polynucleotide?

Option: 1

Phosphoester bond


Option: 2

Phosphotriester bond


Option: 3

Phosphodiester bond


Option: 4

Ester bond


Answers (1)

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Nucleic Acids - DNA and RNA -

Nucleic Acids - DNA and RNA

DNA:

  • The deoxyribonucleic acid (DNA) is a polymer of deoxynucleotides. 
  • The pentose sugar in deoxynucleotides lack the -O at C-2. This is the reason it is called the deoxyribose sugar.
  • DNA is a polymer of nucleotides. It means many nucleotides are linked with each other via a covalent bond to form a polymer.
  • The covalent bond that links the two nucleotides is called phosphodiester bond. 
  • Hence, a polynucleotide chain is formed when many nucleotides are united via the phosphodiester bond.
  • A DNA is made up of two polynucleotide chains that are connected with each other via hydrogen bonds.

 

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A polynucleotide chain is formed when many nucleotides are united via the phosphodiester bond.

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