Indicate whether each of the following descriptions better matches miRNAs (M) or siRNAs (S) in animal cells. Your answer would be a four-letter string composed of letters M and S only, e.g. MMMM.
( ) They usually cleave their target RNAs using the slicing activity of the Argonautes.
( ) They typically show perfect complementarity with their target RNA.
( ) They can bind to the RITS as well as the RISC complex.
( ) They seem to be the more ancient form of small noncoding RNAs.

Question

Indicate whether each of the following descriptions better matches miRNAs (M) or siRNAs (S) in animal cells. Your answer would be a four-letter string composed of letters M and S only, e.g. MMMM.
( )	They usually cleave their target RNAs using the slicing activity of the Argonautes.
( )	They typically show perfect complementarity with their target RNA.
( )	They can bind to the RITS as well as the RISC complex.
( )	They seem to be the more ancient form of small noncoding RNAs.

Quizplus · Accepted Answer

S
S
S
 The small interfering RNAs (siRNAs) appear to be the most ancient form of RNA interference. Having an exact match to their target RNA molecules, they direct the cleavage of the target. siRNAs can also control transcription of target genes by binding to the RNA-induced transcriptional silencing (RITS) complex.

Indicate Whether Each of the Following Descriptions Better Matches MiRNAs