Direct-repair mechanisms change altered nucleotides back into their correct structures. In base-excision repair, glycosylase enzymes recognize and remove specific types of modified bases. The entire nucleotide is then removed and a section of the polynucleotide strand is replaced.
-How do direct-repair mechanisms differ from mismatch repair and base-excision repair?

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The Answer of Direct-repair mechanisms change altered nucleotides back into their correct structures. In base-excision repair, glycosylase enzymes recognize and remove specific types of modified bases. The entire nucleotide is then removed and a section of the polynucleotide strand is replaced.
-How do direct-repair mechanisms differ from mismatch repair and base-excision repair?

Direct-Repair Mechanisms Change Altered Nucleotides Back into Their Correct Structures