<prompt> Severe destruction of DNA can be tested by:ELISAPCRSTRWestern blot  <response>: PCR is an in vitro method for amplifying a selected DNA sequence that does not rely on the biologic in vivo cloning method. PCR permits the synthesis of millions of copies of a specific nucleotide sequence in a few hours. It can amplify the sequence, even when the targeted sequence makes up less than one part in a million of the total initial sample. The method can be used to amplify DNA sequences from any source, including viral, bacterial, plant, or animal.Key concept:Polymerase chain reaction can even find cases with severe destruction of DNA. Ref : Lippincotts illustrated reviews for biochemistry , 7th edition. 