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Which repair system operates to remove the altered bases generated by reactive chemicals present in the diet?

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Which repair system operates to remove the altered bases generated by reactive chemicals present in the diet?

(a) Base excision repair

(b) Nucleotide excision repair

(c) Mismatch repair

(d) Double-stranded breakage repair

I got this question in an interview.

My question is based upon DNA Repair topic in division DNA Replication and Repair, Cellular Reproduction of Cell Biology

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Correct choice is (a) Base excision repair

The explanation is: Base excision repair system (BER) operates to remove or rectify the altered nucleotides generated as a result of action of reactive chemicals presented in the diet or generated by the metabolism.

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