Ribonucleic acid (RNA) is a fundamental type of nucleic acid crucial to the processes of molecular biology, playing roles primarily in gene expression and protein synthesis. Structurally, it is a single-stranded polymer composed of ribose sugar, phosphate groups, and the nitrogenous bases adenine, uracil, cytosine, and guanine. Unlike deoxyribonucleic acid, the presence of uracil in place of thymine is a defining characteristic. Various forms of RNA exist, each with specialized functions; for instance, messenger RNA carries genetic information from DNA in the nucleus to the ribosomes, serving as a template for translation. Transfer RNA plays a vital role in delivering specific amino acids to the ribosome, and ribosomal RNA constitutes the structural and catalytic core of the cellular machinery responsible for peptide bond formation.