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.
Narrower than a phone box & shorter than a Vespa, the P50 microcar is officially the Worldâs Smallest Car. Made on the Isle of Man in the early 1960s, fewer than 30 exist today making it one of the rarest cars in the World. Famously TV presenter Jeremy Clarkson drove a 1963 P50 through the BBC right up to his desk.