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.
The smallest public funicular in the world is the Fisherman's Walk Cliff Railway in Bournemouth, England, at a length of 39 metres (128 ft). The smallest funicular in Croatia is the Zagreb Funicular with a length of 66.0 m (216.5 ft).