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.
What is the largest unit of measurement for distance? The largest unit of distance that I'm aware of is the gigaparsec (Gpc) or 1 billion parsecs. Astronomers use a method called parallax to measure the distance to some stars, anâ¦d an object with a parallax of one second is said to be 1 parsec away. This distance is 3.09x1016 meters, so a gigaparsec is 3.09x1025 meters. The observable universe is thought to have a diameter of about 28 gigaparsecs, so there would be little use for any larger measurements. The largest unit would be a yottaparsec which is much bigger than a gigaparsec.