ICSE Class X Biology 2013 Solved Papers

Question : 90 of 90

Marks: +1, -0

Write the names of four nitrogenous bases in a DNA molecule.

Solution:

Nitrogenous bases of DNA molecules :

\table (\a) \Adenine; (\b) \Guanine \} \Purines

\table (\c) \Cytosine;(\d) \Thymine\}\Pyrimidines

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