Guanosine is a nucleoside composed of the nitrogenous base guanine and the sugar ribose. It plays a crucial role in cellular processes, including the synthesis of RNA and the regulation of various biochemical pathways. Guanosine is also involved in energy transfer within cells, particularly as part of GTP (guanosine triphosphate), which is essential for protein synthesis and signal transduction. In addition to its biological functions, guanosine has potential therapeutic applications. Research suggests it may have neuroprotective effects and could be beneficial in treating conditions like neurodegenerative diseases. Its role in cellular signaling makes it a subject of interest in pharmacology and biochemistry.