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Biochemistry General 0c8aa00f

The primary defect in Xeroderrna pigmentosa is

A
Formation of thymidine dimmers
B
Poly ADP ribose polymerase is defective
C
Exonuclease is defective
D
Formation of adenine dimmers.
High-Yield Explanation
In xeroderma pigmentos a; nucleotide excision repair of damaged DNA is defective due to formation of TT dimers

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