Explain the role of RNA and DNA in the continuity of life.

RNA or ribonucleic acid and DNA or deoxyribonucleic acid both play a central role in the perpetuation of species.
DNA is a double stranded, long polymer of nucleotide units whose main function is the long term storage of genetic information required for the development and function of living things.
The segment of the DNA responsible for the storage of this genetic information is called the gene, but other structural segments of the DNA play a role in regulating the way the genetic information is expressed.
RNA is similar to DNA but is single stranded. Copies of RNA are transcribed from the stretch of DNA by the action of RNA polymerase enzymes. The transcribed RNA forms the template for translating genetic information into the synthesis of proteins. This process enables genetic information to be accurately copied and transferred to subsequent generations.