NEET2021Zoology-Polymerase Chain Reaction
NEET 2021 Zoology PCR Steps Sequence MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?
A
Denaturation, Annealing, Extension
B
Denaturation, Extension, Annealing
C
Extension, Denaturation, Annealing
D
Annealing, Denaturation, Extension
Correct Answer
Option A
Detailed Explanation
The correct sequence in PCR is denaturation (heating to separate DNA strands), annealing (cooling to allow primers to bind), and extension (DNA synthesis by polymerase).
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