Question

why is rna interference aptly named? see section 19.4.
the function of rna polymerase is prevented when it binds to mirna.
the function of risc complex is prevented when it binds to mirna.
both the mirna that does the interfering and the mrna that is destroyed are rna.
the risc complex is cleaved when it binds mrna.

Explanation:

To determine why RNA interference is aptly named, we analyze each option:

• Option 1: RNA interference does not involve preventing RNA polymerase function by binding to miRNA. RNA polymerase is for transcription, not directly related to miRNA - mediated interference.
• Option 2: The RISC complex functions in RNA interference, and miRNA binds to RISC to help it target mRNA, not prevent RISC's function.
• Option 3: RNA interference involves miRNA (a type of RNA) interfering with mRNA (also RNA) by, for example, degrading it or preventing its translation. So the name is apt because both the interfering molecule (miRNA) and the molecule being interfered with (mRNA) are RNA.
• Option 4: The RISC complex cleaves mRNA, not that RISC is cleaved when binding mRNA.

Answer:

C. Both the miRNA that does the interfering and the mRNA that is destroyed are RNA.