Small RNA molecules that specifically down-regulate expression by binding to the appropriate mRNA molecule and inhibit translation are
A)mRNAs.
B)siRNAs.
C)tRNAs.
D)rRNAs.
E)miRNAs.

Question

Quizplus · Accepted Answer

The small RNA molecules that specifically down-regulate gene expression by binding to mRNAs and inhibiting translation are called microRNAs (miRNAs). SiRNAs (small interfering RNAs) are also small RNA molecules that can cause gene silencing by binding to mRNA, but they are typically generated by exogenous sources such as dsRNA viruses or synthetic duplexes. tRNAs and rRNAs are types of non-coding RNAs involved in translation and ribosome function, respectively. Therefore, the most appropriate choice is E, miRNAs.

Small RNA Molecules That Specifically Down-Regulate Expression by Binding to the Appropriate