In both DNA and RNA, heterocyclic base and phosphate ester linkages are at

  • Option 1)

    C_{5}'\; and\: C_{2}' respectively of the sugar molecule

  • Option 2)

    C_{2}'\; and\: C_{5}'  respectively of the sugar molecule

  • Option 3)

    C_{1}'\; and\: C_{5}' respectively of the sugar molecule

  • Option 4)

    C_{5}'\; and\: C_{1}'  respectively of the sugar molecule

 

Answers (1)

As we learnt in

Nucleotide -

Made up of three components :

  1. Pentose sugar
  2. Phosphoric acid
  3. Nitrogenous base

- wherein

 

 In DNA and RNA heterocylic base and phosphate ester are at C{}'_{1} and C{}'_{5} respectively of the sugar molecule


Option 1)

C_{5}'\; and\: C_{2}' respectively of the sugar molecule

This option is incorrect

Option 2)

C_{2}'\; and\: C_{5}'  respectively of the sugar molecule

This option is incorrect

Option 3)

C_{1}'\; and\: C_{5}' respectively of the sugar molecule

This option is correct

Option 4)

C_{5}'\; and\: C_{1}'  respectively of the sugar molecule

This option is incorrect

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