Very low concentration of a bacteria or virus can be detected by amplification of their nucleic acid by PCR.Can you explain how PCR can detect very low amount of DNA? Share with your friends Share 0 Jahirul Mazumder answered this Please refer the link below:- https://www.meritnation.com/ask-answer/question/can-u-explain-how-pcr-can-detect-very-low-amounts-of-dna/biotechnology-and-its-applications/8957787 0 View Full Answer