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.
To promote the newest edition of Guinness World Records, Chandra Bahadur Dangi, who at 21.5 inches is the world's shortest man, met the world's Shortest Woman, Jyoti Amge, who measures 24.7 inches. Jyoti Amge, 18, of Nagpur, India, who is 24.7 inches tall, has just been declared the world's smallest living woman. Amge is a budding fashionista who customizes her own clothes and jewelry. She is also pursuing a career as an actress in Bollywood films.