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In which PCR step do primers bind to the complementary sequences of target DNA?

Answer and explanation

Correct answer: एनीलिंग (Annealing)

PCR proceeds through three principal steps. During denaturation, heat separates the two DNA strands. In the next step, called annealing, the temperature is lowered so that short primers form hydrogen bonds with their complementary sequences on the single-stranded template DNA. These primers provide the free 3′-OH end needed by DNA polymerase to begin extension. During extension, polymerase adds nucleotides to the primers. Therefore, option A, annealing, is correct. Boiling, filtration and drying are not recognized PCR stages and cannot explain primer-template binding.

Related tags

PcrAnnealingPrimer-BindingPcr (Polymerase Chain Reaction)Pcr Polymerase Chain ReactionProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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