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What is meant by RNA interference? Explain briefly.

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RNA interference (RNAi) is a mechanism in molecular biology that involves silencing of a specific mRNA due to a complementary dsRNA molecule that binds to and prevents translation of the mRNA. The source of this complementary RNA could be from an infection by viruses having RNA genomes or mobile genetic elements (transposons) that replicate through an RNA intermediate. RNA interference takes place in all eukaryotic organisms as a method of cellular defense.

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