Double-stranded RNA

Definition

Double-stranded RNA (dsRNA) consists of two complementary strands of RNA that form a helical structure. It plays crucial roles in cellular processes, including antiviral defense and gene silencing mechanisms.

5 Must Know Facts For Your Next Test

1. Double-stranded RNA is often involved in the process of RNA interference (RNAi), which regulates gene expression by degrading specific mRNA molecules.
2. In many viruses, dsRNA serves as the genetic material, triggering immune responses in host organisms.
3. Cellular enzymes like Dicer recognize dsRNA and cleave it into small interfering RNAs (siRNAs) during RNAi pathways.
4. The presence of dsRNA in cells can activate pathways such as the interferon response, which helps to combat viral infections.
5. Researchers use synthetic dsRNA molecules in laboratory settings to study gene function and develop therapies for diseases.

Review Questions

Related terms

RNA Interference (RNAi): A biological process where double-stranded RNA leads to the degradation of specific mRNA molecules.

Small Interfering RNAs (siRNAs): Short, double-stranded RNA molecules that mediate the process of RNA interference.

Interferon Response: An immune response triggered by the presence of double-stranded RNA to help combat viral infections.