Repeat-associated small-interfering RNAs (rasiRNAs) account for 90-95% of the global small RNA population in all plant...

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Biology

Repeat-associated small-interfering RNAs (rasiRNAs) account for90-95% of the global small RNA population in all plant species. Astheir name suggests, rasiRNAs are derived from the various classesof repetitive DNA that constitute more than 95% of the entirenuclear genome sequence of a plant. The rasiRNAs keep the majorityof the repetitive DNA in an inactive state. State; (1) theDNA-dependent RNA polymerase(s) involved in rasiRNA precursortranscript transcription; (2) whether rasiRNA precursors aremolecules of perfectly or imperfectly structured double-strandedRNA (dsRNA); (3) the DICER-LIKE (DCL) endonuclease(s) responsiblefor rasiRNA production; (4) the size of rasiRNAs, and; (5) themechanism of RNA silencing directed by rasiRNAs in order tomaintain repetitive DNA in an inactive state.

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In plants the biogenesis of rasiRNA starts with DNAdependent RNA polymerase to produce single stranded RNA this strand gets converted in to double stranded RNA by the RNAdependent RNA polymerases See Answer

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