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easyMCQNEET 20212026Biology
1 mark

Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?

  1. A
    Extension, Denaturation, Annealing
  2. B
    Annealing, Denaturation, Extension
  3. C
    Denaturation, Annealing, Extension
  4. D
    Denaturation, Extension, Annealing

Solution & Step-by-step Explanation

[Image showing the three steps of PCR: Denaturation, Annealing, and Extension]The PCR cycle consists of three steps:Denaturation: Heating to separate DNA strands ().Annealing: Primers bind to the template strands ().Extension: DNA polymerase adds nucleotides ().

Practice this question

Try it yourself before checking the explanation above.

Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?
A
Extension, Denaturation, Annealing
B
Annealing, Denaturation, Extension
C
Denaturation, Annealing, Extension
D
Denaturation, Extension, Annealing

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