RNA

RNA was the first genetic material .there is now enough evidence to suggest that essential life processes,(such as metabolism ,translation,splicing, etc ), evolved around RNA .RNA used to act as a genetic material as well as a catalyst (there are some important biochemical reaction in living systems that are catalyst by RNA catalyst and not by protein enzymes) . But , RNA being a catalyst was reactive and hence unstable .therefore ,DNA has a evolved from RNA with chemical modifications that make it more stable ..DNA being double standard and having complimentary strand further resists changes by evolving a process of repair.

• there are three major types of  RNAs : mRNA (messenger RNA ),tRNA (Transfer RNA ), And rRNA(ribosomal RNA )..
  

• All three RNAs are needed to synthesise a protein in a cell.
• the mRNA provides the template,tRNA brings aminoacids  and reads the genetic code, and rRNA play  structural and catalystic role during translation …

DNA

DNA is a long polymer of deoxyribonucleotides.  The length ofDNA is usually defined as number of nucleotides (or a pair of neucleotide reffered to as base paris ).DNA as an acidic substance  present in nucleus was first identified by “Friedrich Meischer in 1869. DNA is a long molecule that contains our unique genetic code .like a recipe book it holds the instraction for making all proteins in our bodies..

• DNA contains four basic building blocks or “bases”….Adenine (A) , Cytosine (C) , Guanine(G) ,and Thymine(T)…