Question

Which of the following statements is correct?

1) microRNAs bind DNA and block transcription
2) microRNAs bind mRNA and block translation
3) microRNAs bind ribosomal RNA and block translation
4) all of the above

Answer 1

MicroRNAs bind to mRNA and block its translation, playing a pivotal role in gene regulation.Hence, the correct answer is option 2.

Step-by-step explanation:

The correct statement regarding microRNAs (miRNAs) is that they bind to mRNA and block translation. miRNAs are small, non-coding RNA molecules that play a crucial role in gene regulation by binding to complementary sequences on mRNA molecules, which can result in the degradation of the mRNA or the inhibition of its translation. These miRNAs associate with a ribonucleoprotein complex called the RNA-induced silencing complex (RISC), and together they can impede the translation of the targeted mRNA, thereby regulating gene expression.