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  • Which of the following group is present at C-2 of a deoxynucleotide?Option: 1 <img alt="-OH" src="https://learn.careers360.com/latex-image/?-OH"

Which of the following group is present at C-2 of a deoxynucleotide?

Option: 1

-OH


Option: 2

-H


Option: 3

-CHO


Option: 4

-CH_{2}OH


Answers (1)

best_answer

 

 

 

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.
  • 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.
  • The two polynucleotide chains are helically arranged around each other.
  • In a polynucleotide chain, the backbone is formed of sugar and phosphate while the nitrogenous bases form hydrogen bonds.
  • Adenine forms two hydrogen bonds with thymine.
  • Cytosine forms three hydrogen bonds with guanine.-

 

 

The pentose sugar in deoxynucleotides lack the -O at C-2. This is the reason it is called the deoxyribose sugar.

Posted by

Ritika Jonwal

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