|  | An enzyme that recognizes and repairs incorrect 
                              pairings of nitrogenous bases in DNA. For instance, 
                              a mismatch repair enzyme would recognize when Cytosine 
                              (C) is mistakenly paired with Thymine (T). The enzyme 
                              would then replace Thymine with Guanine (G), resulting 
                              in a correct pair between Cytosine (C) and Guanine 
                              (G). |  |