Exposure of an organism to UV radiation cause | vedclass

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(B) Exposure to $UV$ radiation,particularly $UV-B$,causes the formation of pyrimidine dimers,most commonly thymine dimers,in $DNA$. This occurs becaus

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Formation of thymine dimers

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(B) Exposure to $UV$ radiation,particularly $UV-B$,causes the formation of pyrimidine dimers,most commonly thymine dimers,in $DNA$. This occurs because $UV$ light provides enough energy to form covalent bonds between adjacent thymine bases on the same strand of the $DNA$ molecule. These dimers distort the $DNA$ structure,which can lead to mutations during $DNA$ replication if not repaired by the cell's repair mechanisms.

Exposure of an organism to $UV$ radiation causes:

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