What is RNA interference method?
Question
What is RNA interference method?
Solution
RNA interference (RNAi) is a biological process in which RNA molecules inhibit gene expression or translation, by neutralizing targeted mRNA molecules. Here are the steps involved in RNA interference:
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Initiation: The process begins when a long double-stranded RNA (dsRNA) is cut or "diced" into small fragments about 21 nucleotides long by an enzyme called Dicer. These small fragments are known as small interfering RNAs (siRNAs).
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Assembly: The siRNAs are then incorporated into a protein complex known as the RNA-induced silencing complex (RISC). Within the RISC, the siRNA strands are separated. The strand that is complementary to the target mRNA molecule remains in the RISC and guides the complex to the target mRNA.
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Targeting: The RISC, guided by the siRNA, binds to the target mRNA molecule. The sequence of the siRNA is complementary to the sequence of the target mRNA, which allows the RISC to recognize and bind to the mRNA.
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Degradation: Once the RISC has bound to the target mRNA, it cleaves or cuts the mRNA, effectively destroying it and preventing it from being used as a template for protein synthesis.
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Amplification: In some organisms, the process can be amplified by using the cleaved mRNA fragments to produce more siRNAs.
In summary, RNA interference is a method that uses small RNA molecules to target and destroy specific mRNA molecules, preventing them from being used to produce proteins. This process can be used to regulate gene expression or to defend against viral infection.
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