What is the name of the enzyme that cleaves dsRNA into the small, double-stranded fragments known as small-interfering RNAs (siRNAs)?
A)riboendonuclease
B)Dicer ribonuclease
C)deoxyribonuclease
D)RNA helicase
E)reverse transcriptase

Question

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The enzyme that cleaves dsRNA into siRNAs is called Dicer ribonuclease. Ribonucleases are enzymes that catalyze the degradation of RNA, so choice A is a possible distraction. Deoxyribonucleases (choice C) would cleave DNA, not RNA. RNA helicase (choice D) unwinds RNA helix to provide access to enzymatic activities such as RNA polymerase, ribonuclease, etc. but it does not perform dsRNA cleavage. Reverse transcriptase (choice E) is a RNA-dependent DNA polymerase, which synthesizes a complementary DNA copy of a single-stranded RNA molecule. It has no role in dsRNA cleavage.

What Is the Name of the Enzyme That Cleaves DsRNA