RNA stains are specialized dyes used to visualize ribonucleic acid (RNA) in biological samples. These stains bind specifically to RNA molecules, allowing researchers to observe their presence and distribution within cells or tissues under a microscope. Common RNA stains include SYBR Green and Ethidium Bromide, which emit fluorescence when bound to RNA. The use of RNA stains is crucial in various applications, such as molecular biology and genetics, where understanding RNA expression levels can provide insights into cellular functions and disease mechanisms. By analyzing stained samples, scientists can assess the quality and quantity of RNA in their experiments.