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.
Report Abuse. The unit of measurement of distance in space is the distance that light could travel over a period of one year at the rate of 186000 mile per second. because distances of such immense magnitutude are very long and difficult to write and pronounce in terms of figures ,as tromers have adopted such a scale.ow if your question is how to measure a distance between object just by looking at a light coming from it, it may done by looking at half-life time of photons. Somebody technical at particle physics may give a detail answer on this.