The First Step in Base Excision Repair Is

question 38

Multiple Choice

The first step in base excision repair is

• A)removal of a double-stranded fragment of damaged DNA.
• B)nicking the backbone of one DNA strand.
• C)recognizing and excising the incorrect base from a nucleotide.
• D)removing extraneous groups such as methyl or oxygen added by mutagens.
• E)replacing an A-T base pair with a C-G base pair.

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