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Basically, RNA polymerase's role is very similar to that of DNA polymerase. RNA polymerase is an enzyme that is used during transcription in the nucleus. Similar to DNA polyme â¦ rase, RNA polymerase codes for the complementary nucleotides to a DNA strand. Instead of thymine though, uracil codes with adenine.
DNA also contains all the genetic coding which is used to control functions, behavior and development of an organism. DNA is also used as a long term storage device to store the genetic instructions. These instructions must be correct so the DNA can make an exact copy of itself. The function of DNA in a cell is to code the way proteins turn genes on or off. the function of DNA is to make the proteins. DNA is the foundation of life.