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12th Class Chemistry Sample Paper Chemistry Sample Test Paper-1

  • question_answer
      Name the products obtained on complete hydrolysis of DNA. Enumerate the structure difference between DNA and RNA.                                                                                                                                                                                             3

    Answer:

                      Complete hydrolysis of DNA gives pentose sugar, two types of heterocyclic nitrogenousbases like purines and                 pyramidines along phosphoric acid.                                                                                                                                         1                                                                 Structural differences between DNA and RNA
    DNA RNA
    (i) The sugar present in DNA is 2-deoxy D (-)ribose. The sugar present in RNA is D (-) ribose.
    (ii) DNA contains cytosine, thymine, guanine  and adenine bases, RNA contains cytosine, uracil, guanine and adenine bases.
    (iii) DNA has double stranded a-helix structure. RNA has single stranded a-helix structure.
                                                                                                                                                                                                                    2


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