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The phenomenon of RNA interference is mediated by:

Option 1: Ribonucleotide reductase
Option 2: Argonaute proteins and small interfering RNAs (siRNAs)
Option 3: DNA polymerase
Option 4: RNA polymerase

Answer :

Final answer:

The phenomenon of RNA interference is mediated by argonaute proteins and small interfering RNAs (siRNAs). It involves the binding of siRNAs to complementary mRNA molecules, preventing protein synthesis. Option 2 is correct.

Explanation:

The phenomenon of RNA interference is mediated by Argonaute proteins and small interfering RNAs (siRNAs) (Option 2).

RNA interference (RNAi) is a natural regulatory mechanism that prevents mRNA molecules from guiding the synthesis of proteins. It involves the base pairing of short, single-stranded antisense RNA molecules (siRNAs) to complementary mRNA molecules, which inhibits protein synthesis. The siRNAs are bound to DICER and then to RNA-induced silencing complex (RISC), which cleaves the mRNA or inhibits translation. This mechanism is known as gene silencing.

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