The role of ribonucleic acid (RNA) in cells includes serving as a crucial messenger and facilitator in the expression of genes. RNA is involved in various processes, primarily in transferring genetic information from the DNA in the nucleus to the cytoplasm, where proteins are synthesized. Different types of RNA, such as messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA), play distinct roles in protein synthesis and regulation of gene expression. RNA’s versatility is central to cellular functions and adaptation.