|Polymerase chain reaction (PCR) is advance technique in recombinant DNA research with impact on molecular cloning and genetics. By PCR a target sequence of DNA can be amplified a billion fold in several hours. The different steps of PCR are Denaturation, Annealing and Primer extension.
Scholarly peer review is the process of subjecting an author's scholarly work, research, or ideas to the scrutiny of others who are experts in the same field, before a paper describing this work is published in a journal. The work may be accepted, considered acceptable with revisions, or rejected. Peer review requires a community of experts in a given (narrowly defined) field, who are qualified and able to perform reasonably impartial review.