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.
Known to man i would say Quark, as smallest object. then there is planck-length: A Planck length is 1.6 x 10^-35 meters (the number 16 preceded by 34 zeroes and a decimal point) Which is really really small.