1. Messenger RNA (mRNA): This is the RNA molecule that carries the genetic information from DNA in the nucleus to the ribosomes in the cytoplasm, where protein synthesis takes place.

2. Transfer RNA (tRNA): This RNA molecule acts as a translator, bringing specific amino acids to the ribosome according to the instructions carried by mRNA.

3. Ribosomal RNA (rRNA): This RNA molecule is a structural component of ribosomes, which are the sites of protein synthesis. It helps to catalyze the formation of peptide bonds between amino acids.

Let me know if you'd like to learn more about any of these types of RNA!