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well i am not sure what are you asking but if you think the units that form DNA and RNA then the answer would be NUCLEOTIDES ...there are 4 types of nucleotide ... ADENINE THYMINE GUANINE CYTOSINE in case of DNA and in case of RNA THYMINE is substituted with URACIL. Arizona D Â· 7 years ago.
DNA and RNA are strands of nucleotides. DNA is a double-stranded  nucleotide, and RNA is a single-stranded nucleotide.    Both DNA and RNA are known as nucleic acids.â¦ DNA in most cases has  control on the genetic information of the cell where as RNA is  produced by DNA strands to perform specific functions.here are many types of RNA including mRNA, tRNA, and rRNA. mRNA and tRNA are involved in protein synthesis and the process of â¦ translation. mRNA and tRNA bind to the ribosome and form polypeptides or proteins that are released into the cell.