Uploaded June 2026 | Updated September 2026, 1 hour ago

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🧬 Tiny DNA sample? PCR can turn it into billions of copies.

In this short video, Sumita explains how scientists use PCR to amplify tiny amounts of DNA into billions of copies using a PCR tube, primers, nucleotides, DNA polymerase, and a thermocycler.

The process cycles through three key stages:
⚡ Denaturation — DNA strands separate
🧪 Annealing — primers bind to target DNA
🧬 Extension — DNA polymerase builds new DNA strands

Each cycle doubles the DNA, allowing scientists to detect and study specific genetic sequences from extremely small samples.

PCR is used across:

Genetic research
Medical diagnostics
Forensic science
Biotechnology
Conservation biology

Perfect for:

A-Level Biology revision
GCSE & university biology students
DNA and genetics topics
Molecular biology practicals
Quick science revision

Short. Visual. Real lab science.

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