Q71 of 71 Page 213

Write the structures of fragments produced on complete hydrolysis of DNA. How are they linked in DNA molecule? Draw a diagram to show pairing of nucleotide bases in double helix of DNA.

The complete hydrolysis of DNA molecule yields a pentose sugar, phosphoric acid and nitrogen containing heterocyclic biological compound called bases.



Ribose



Deoxyribose



Phosphoric acid


The four nitrogenous bases produced are – Adenine(A), Guanine(G), Cytosine(C), Thymine(T).


Adenine


Guanine


Cytosine


Thymine



Adenine-Thymine pairing



Guanine-Cytosine pairing


Pairing of nucleotides in a DNA molecule



Double helical structure of DNA


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