Uracil along with adenine, cytosine, and guanine are the four nucleobases in the nucleic acid RNA. Uracil uses two hydrogen bonds to bind to adenine in RNA. When it comes to DNA, thymine replaces the uracil nucleobase. When thymine is demethylated, it is regarded as Uracil. In the body, it helps to do synthesize several enzymes required for cell function by bonding with phosphates and riboses. Uracil also finds use in polysaccharides biosynthesis and transports sugars that contain aldehydes.