試題詳解

30. Which of the following statements is correct regarding small RNA-mediated silencing pathways in eukaryotes?
(A) Piwi-interaction RNAs (piRNAs) are expressed predominantly in vegetative cells.
(B) Both small interfering RNAs (siRNAs) and microRNAs (miRNAs) are generated from longer RNA molecules by Dicer.
(C) The major component of the RNA-induced silencing complex is called Drosha.
(D) The size of small RNAs is typically in the range of 30-40 nucleotides.
(E) The miRNA is typically highly specific with only one mRNA target. editing.