Definition of Mismatch repair Mismatch repair: A system within
the cell for correcting errors in DNA that works by detecting
and replacing bases in the DNA that are wrongly paired
(mismatched bases). The system repairs the mismatch. When there
is a mismatch in the DNA, a mismatch correction enzyme goes to
that strand of DNA and removes a segment of the strand
containing the mismatched base. The gap in the strand is then
filled through the action of the enzyme DNA polymerase.Source:
MedTerms™ Medical Dictionary Last Editorial Review: 6/14/2012
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