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KVPY Sample Paper KVPY Stream-SX Model Paper-1

  • question_answer
    Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank Component "X" in it.

    A)
    Category Component
    Cholesterol Guanine

    B)
    Category Component
    Amino acid \[N{{H}_{2}}\]

    C)
    Category Component
    Nucleotide Adenine

    D)
    Category Component
    Nucleoside Uracil

    Correct Answer: D

    Solution :

    [d] A combination of a nitrogen base with a pentose sugar is known as nucleoside. The Nitrogen base combines with the sugar Molecule at its carbon atom 1' in a glycosidic bond (C-N-C) by one of its nitrogen atoms (usually 1 in pyrimidines and 9 in purines). Depending upon the type of pentose sugar, nucleosides are differentiated into ribonucleosides and deoxyribonucleosides.


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