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NUCLEIC ACIDS (DNA and RNA) Introductio Nucleic acids are important component of cells, which control all the activities of cell. Discovery Nucleic acids were first isolated in 1869 by  F. Miescher  from the nuclei of pus cells. Due to their isolation from nuclei and their acidic nature, they were named as nucleic acids. Types of nucleic acids There are two main types of nucleic acids i.e, Ribonucleic acid (RNA) Deoxyribonucleic acid (DNA) Their chemical composition is described as follows; Nucleotide Nucleotides are units of nucleic acids, which are linked to each other by ester linkage to form polynucleotide chains DNA is made of deoxyribonucleotides. RNA is made of ribonucleotides. Chemical composition of nucleotide Typically a nucleotide is composed of three components i.e. Pentose sugar Nitrogenous base Phosphoric acid (i) Pentose Sugar Pentose sugar in RNA is  ribose (C 5 H 10 O 5 ) Pentose sugar in DNA is  deoxyribos...