Which of the Following Best Defines MiRNAs

Question

Which of the following best defines miRNAs?
A)non-coding RNAs that modulate the transcription of mRNA
B)non-coding RNAs that modulate the translation of mRNA
C)coding RNAs that modulate the transcription of mRNA
D)coding RNAs that modulate the translation of mRNA

Accepted Answer

miRNAs (microRNAs) are non-coding RNAs that modulate the translation of mRNA by binding to complementary sequences in the 3' untranslated region (UTR) of target mRNA molecules, leading to either their degradation or suppression of their translation. They do not affect transcription directly.