Question

The siRNA in RNAi (RNA interference) is?

1) A small RNA molecule that inhibits gene expression
2) A protein that cleaves RNA molecules
3) A DNA molecule that binds to mRNA
4) A viral particle that disrupts cellular processes

Answer 1

siRNA in RNAi is a small RNA molecule that inhibits gene expression.

Step-by-step explanation:

The siRNA in RNAi (RNA interference) is a small RNA molecule that inhibits gene expression. siRNAs are completely complementary to the mRNA transcript of a specific gene of interest. They interact with the mRNA and prevent translation and protein synthesis, thereby interfering with gene expression.