1. N² 2. 2ⁿ 3. 2n + 1 4. 2N²

Polymerase chain reaction (PCR) amplifies DNA following the equation.

1. N^2

2. 2^n

3. 2n + 1

4. 2N^2

Doubtly Asked 30 Oct 2026 NEET UG 2025 Practice test neet Save WhatsApp Report

Best answer

Answer: 2. 2^n

Key idea: In each PCR cycle every DNA molecule is copied once, so the number of copies doubles.

Starting from one DNA molecule, after \(n\) cycles the copies are \(2^n\): 2, 4, 8, 16 and so on. So the equation is \(2^n\).

The other options do not give doubling per cycle.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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