Which of the following DNA sequences would be the most likely to be damaged by UV radiation?

ATGCACATGA
GACACGTAGA
GCATGACATA
CTTGAATTAA


CTTGAATTAA Explanation:
The only sequence that includes adjacent thymines is the CTTGAATT. The other sequences among these choices do not include adjacent thymines or cytosines so would not likely form thymine or pyrimidine dimers upon exposure to UV radiation.

Biology & Microbiology

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