What Are the Differences Between PiRNAs on the One Hand

Multiple Choice

What are the differences between piRNAs on the one hand and si/miRNAs on the other hand?

A) piRNAs are longer than si/miRNAs.
B) The majority of mammalian piRNAs can be mapped to a small number of huge genomic loci,unlike si/mi RNAs.
C) The formation of piRNAs does not involve the formation of dsRNA precursors,unlike si/mi RNAs.
D) Formation of piRNAs does not involve cleavage by Dicer ribonuclease,but instead it depends on the endonuclease activity of the PIWI protein acting on a long,single stranded primary transcript.
E) All of these are correct.