Ncert Exercises & Solutions

Which of the following has popularised the PCR (Polymerase Chain Reaction)?
1. Easy availability of DNA template
2. Availability of synthetic primers.
3. Availability of cheap deoxyribonucleotides
4. Availability of ‘Thermostable’ DNA polymerase

(d) The Polymerase Chain Reaction (PCR) is a reaction in which amplification of specific DNA sequences is carried out in vitro. Such repeated amplification is achieved by the use of a thermostable DNA polymerase (isolated from a bacterium, Thermus aquaticus), which remain active and stable during the high temperature and induced denaturation of doubie-standard DNA.

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