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NUCLEIC ACIDS Nucleic demigods ar involved in the storage and transfer of polygenic in conformationation in all living organisms, including the simplest viruses. There nuclear number 18 2 types of nucleic acid in cells, Deoxyribonucleic acid (desoxyribonucleic acid) and Ribonucleic acid (ribonucleic acid). Nucleic acids argon so named because DNA was 1st apart(p) from nuclei, but both DNA and ribonucleic acid also evanesce in former(a) parts of the cell, e.g. DNA is also appoint in mitochondria and chloroplasts, whilst RNA is also effect in the cytoplasm, particularly at the ribosomes. both DNA and RNA argon polymers, the monomeric units being called nucleotides. DNA and RNA are therefore polynucleotides. There are flipper divers(prenominal) nitrogen-containing organic bases present in nucleic acids: adenine (A), guanine (G), mavin C (C), thymine (T) and uracil (U). A, T, C and G are found in DNA. A, U, C and G are found in RNA (uracil replaces thymin e here). The nitrogenous bases belong to twain polar chemical families. Adenine and guanine are purine bases and mother a double-ringed complex body part. Cytosine, thymine and uracil are pyrimidine bases and have a single-ringed structure The conspiracy of a clams and a base forms a flux called a nucleoside. The do-gooder of a phosphate group to this structure forms the nucleotide. Different nucleotides are formed according to the sugar and bases used. Cells ceaselessly produce nucleotides and these form a pool from which nucleotides can be used up as required for manufacturing DNA, RNA or a florilegium of other substances.

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