Polymerase chain reaction (PCR) is a laboratory technique used to amplify DNA sequences. The method involves using short DNA sequences called primers to select the portion of the genome to be amplified.olymerase chain reaction (PCR) is a laboratory technique used to amplify DNA sequences. The method involves using short DNA sequences called primers to select the portion of the genome to be amplified.
The smallest possible size for anything in the universe is the Planck Length, which is 1.6 x10-35 m across.
Within a microprocessor, electrical current in a transistor flows from a power source through a gate to a power drain. Most microprocessors today measure 90 nanometers as the shortest distance between gates. But 45ânanometer distances are now becoming available and minute distances of 32 and 22 nanometers, once thought to be out of reach, are on the horizon.