Q. Palaeontologists unearthed a human skull during excavation. A small fragment of the scalp tissue was still attached to it. Only little DNA could be extracted from it. If the genes of the ancient man need to be analysed, the best way of getting sufficient amount of DNA from this extract is
A) By hybridizing the DNA with a DNA probe
B) By subjecting the DNA to polymerase chain reaction
C) By subjecting the DNA to gel electrophoresis
D) By treating the DNA with restriction endonucleases
Explanation
The Polymerase Chain Reaction (PCR) is a technique by which small samples DNA can be quickly amplified. Starting with only one gene sized pieces of DNA, this technique is used to make literally billions of copies in only a few hours
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.