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The three repeated steps of PCR are denaturation, extension and:

APrimer weighing
BPrimer freezing
CPrimer annealing
DPrimer numbering
Answer & Solution
Correct answer: C. Primer annealing
1. Strands separate, primers attach, and new DNA is built. 2. The middle step names the attaching. 3. It is primer annealing. _Source: syllabus Biology Class XII, Chapter 11, Biotechnology Principles and Processes._
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