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.
Earth's farthest distance (aphelion) occurs in early July each year when it is approximately 94,555,000 miles (152,171,000 km) from the sun. The distance is one AU (astronomical unit) from the sun. One AU is 93 million miles, which is 8.3 light minutes.