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 Boat Around the World. With all this talk and competition about who can be the youngest person to sail around the world, Alessandro di Benedetto accomplished an equally impressive feat by sailing non-stop and unassisted around the world in the smallest boat in history, just 6.5 meters.