Palaeontologists unearthed a human skull during excavation. A small fragment of 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:

By hybridizing the DNA with the DNA probe

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By subjecting the DNA into polymerase chain reaction

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By subjecting the DNA into gel electrophoresis

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By treating the DNA with restriction endonucleases

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Solution

The correct option is B By subjecting the DNA into polymerase chain reaction
The Polymerase Chain reaction (PCR) is a technique by which small samples of DNA can be quickly amplified. Starting with only one gene sized piece of DNA, this technique is used to make literally billion copies in only a few hours.

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