Multiple choice

Which of the following types of mutations is most likely to result from UV exposure?

  1. Thymidine dimer

  2. Chromosome breakage

  3. Frameshift mutation

  4. Nonsense mutations

  5. Chromosome inversion

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A Correct answer
Explanation

UV exposure leads to thymidine dimers. Thymidine dimer are molecular lesions formed from thymine or cytosine bases in DNA via photochemical reactions. Ultraviolet light induces the formation of covalent linkages by reactions localised on the C=C double bonds.