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Nucleic acids absorb light strongly in the ultraviolet region of the spectrum because they have
________ double-bond systems.
Solution
Purines and pyrimidines (nitrogen bases) occuring in DNA are A, G, T and C and 'U' in RNA
absorb light near ultra violet region. These bases can exist in their tautomeric forms due to
presence of differing arrangement of hydrogen atoms and double bonds. Presence of the
conjugated double bond systems enable the nitrogenous bases to absorb light near UV region.

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Nucleic acids absorb light strongly in the ultraviolet region of the.pdf

  • 1. Nucleic acids absorb light strongly in the ultraviolet region of the spectrum because they have ________ double-bond systems. Solution Purines and pyrimidines (nitrogen bases) occuring in DNA are A, G, T and C and 'U' in RNA absorb light near ultra violet region. These bases can exist in their tautomeric forms due to presence of differing arrangement of hydrogen atoms and double bonds. Presence of the conjugated double bond systems enable the nitrogenous bases to absorb light near UV region.