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Nucleotides and Nucleosides

Ultraviolet l...

Question

Ultraviolet light absorbed by nucleic acids is at

A

26 n m

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B

75 n m

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C

260 n m

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D

1500 n m

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Solution

The correct option is B $260 n m$
Nucleic acids absorb ultraviolet (UV) light due to the heterocyclic rings of the nucleotides, sugar-phosphate backbone of nucleotide does not contribute to absorption. The wavelength of maximum absorption for RNA and DNA is 260nm.
So the correct answer is C.

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