The reconstruction of a continuous two-stranded DNA molecule without mismatch from
a molecule which contained damaged regions. The major repair mechanisms are excision
repair, in which defective regions in one strand are excised and resynthesized using
the complementary base pairing information in the intact strand; photoreactivation
repair, in which the lethal and mutagenic effects of ultraviolet light are eliminated;
and post-replication repair, in which the primary lesions are not repaired, but the
gaps in one daughter duplex are filled in by incorporation of portions of the other
(undamaged) daughter duplex. Excision repair and post-replication repair are sometimes
referred to as "dark repair" because they do not require light