A Researcher Introduced Many Copies of a Double-Stranded RNA into a Culture

Multiple Choice

A researcher introduced many copies of a double-stranded RNA into a culture of mammalian cells and used a fluorescent probe to follow it. Later she finds that the introduced strands separate into single-stranded RNAs and she hypothesizes that the molecules is acting as an miRNA. Which of the following pieces of evidence would support her claim?

A) The degradation rate of the single strand is slower than that of other cellular mRNA's.
B) The rate of accumulation of the polypeptide encoded by the target mRNA is reduced.
C) The amount of the RNA she introduced increases due to transcription.
D) After separating the strands she introduced shut down all translation.