Question

RISC-associated RNAs that result in mRNA cleavage are usually termed:

A) siRNAs
B) miRNAs
C) SNRPs
D) mtDNAs
E) STRs

Answer 1

RISC-associated RNAs that result in mRNA cleavage are usually termed siRNAs. These short double-stranded RNA molecules combine with RNA-induced silencing complex (RISC) proteins to target and degrade complementary regions of foreign RNAs, providing a mechanism of gene silencing and cellular defense against viral infections.

Step-by-step explanation:

RISC-associated RNAs that result in mRNA cleavage are usually termed siRNAs. SiRNAs are short double-stranded RNA molecules that are produced when cells recognize foreign double-stranded RNAs, such as viral RNA genomes. These siRNAs combine with RNA-induced silencing complex (RISC) proteins to target and degrade complementary regions of foreign RNAs. The cleavage of mRNA by siRNAs is an important mechanism of gene silencing and cellular defense against viral infections.