Although both long dsRNA and small interfering RNA (siRNA) activate RNAi, they differ substantially in their mechanisms and applications.
• Long dsRNA (typically 100–1,000 bp or longer)
Processed into multiple siRNAs by Dicer
Generates stronger and longer-lasting RNAi responses
More cost-effective for large-scale production
Widely used in agriculture and insect control
• Synthetic siRNA (21–23 nt)
Directly incorporated into the RNA-induced silencing complex (RISC)
Highly suitable for mammalian cell studies and therapeutic research
Chemically synthesized with high sequence precision
Generally more expensive for large-scale agricultural applications
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