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.
Comfort: The Barryvox 3000 was the smallest avalanche transceiver until the lame, single-antenna Pieps Freeride was released. The 3000 is also smaller than the Tracker3 (which touts that it is the world's smallest avalanche transceiver). Other: The 3000 can be configured to switch between an analog and digital transceiver with the press of the Mode button (the S2 setting, above).