The structural unit of dna and rna?

DNA and RNA are complex structures that are composed of nucleotides and a nitrogenous base. DNA and RNA are made up of four types of nucleotides. For DNA, these are: adenine, guanine, cytosine, thymine. RNA is slightly different. Instead of thymine, uracil is used in the RNA structure. The rest of the nucleotides are characteristic of both DNA and RNA. Also, it is worth remembering that RNA can be transport or template. Messenger RNA carries information from DNA to ribosomes. Transport RNA transports amino acids to the ribosomes of the cell.