<prompt> Bheka isiqephu esingezansi bese uphendula umbuzo ngemuva kwalokho ngolimi olufanayo nesiqephu: Isiqephu: I-Polymerase chain reaction i-DNA. Ukwakheka kwe-DNA namuhla kungenzeka ngisho nangamanani amancane kakhulu egazi: lokhu kuvame ukusetshenziswa kwezesayensi yezomthetho, kepha manje futhi kuyingxenye yenqubo yokuxilongwa kwezifo eziningi. Umbuzo: I-DNA isetshenziswa kuphi namuhla?  <response>: isayensi yezokwelapha 