Which of the following statements best describes siRNA?
A)a short double-stranded RNA,one of whose strands can block gene expression
B)a double-stranded RNA that is formed by cleavage of hairpin loops in a larger precursor
C)a portion of rRNA that allows it to bind to several ribosomal proteins in forming large or small subunits
D)an RNA sequence that can block the expression of some transposons

Question

Quizplus · Accepted Answer

siRNA (short interfering RNA) is a short double-stranded RNA molecule that can bind to mRNA (messenger RNA) and block gene expression by leading to its degradation or preventing its translation into protein. It is typically about 20-25 nucleotides long and is generated by the cleavage of longer double-stranded RNA precursors by the enzyme Dicer. RNA interference (RNAi) mediated by siRNA has become a widely used tool in gene function and drug target discovery studies.

Which of the Following Statements Best Describes SiRNA