Which PCR step involves the binding of primers to denatured DNA strands?

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Multiple Choice

Which PCR step involves the binding of primers to denatured DNA strands?

Explanation:
The binding of primers to denatured DNA strands occurs during the annealing step. After the DNA is heated to separate the two strands, the reaction temperature is lowered so that short primers can find and form hydrogen bonds with their complementary sequences on the single-stranded DNA. This primes the DNA template for synthesis, with the polymerase extending from the bound primers in the next step. The denaturation step is where the strands are separated, and the extension step is where the polymerase builds new DNA from the primers. The option about mammalian cells has no role in PCR.

The binding of primers to denatured DNA strands occurs during the annealing step. After the DNA is heated to separate the two strands, the reaction temperature is lowered so that short primers can find and form hydrogen bonds with their complementary sequences on the single-stranded DNA. This primes the DNA template for synthesis, with the polymerase extending from the bound primers in the next step. The denaturation step is where the strands are separated, and the extension step is where the polymerase builds new DNA from the primers. The option about mammalian cells has no role in PCR.

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