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NUCLEIC ACIDS Nucleic pungents ar involved in the storage and transfer of inherited in realizeation in all living organisms, including the simplest viruses. There nuclear number 18 2 types of nucleic acid in cells, Deoxyribonucleic acid ( deoxyribonucleic acid) and Ribonucleic acid (ribonucleic acid). Nucleic acids ar so named because DNA was 1st uninvolved from nuclei, but both DNA and ribonucleic acid also clear in former(a) parts of the cell, e.g. DNA is also appoint in mitochondria and chloroplasts, whilst RNA is also free-base in the cytoplasm, particularly at the ribosomes. both DNA and RNA ar polymers, the monomeric units being called nucleotides. DNA and RNA be therefore polynucleotides. There are tail fin divers(prenominal) nitrogen-containing organic bases present in nucleic acids: adenine (A), guanine (G), unrivalled 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 thymine h ere). The nitrogenous bases belong to deuce polar chemical families. Adenine and guanine are purine bases and cast a double-ringed complex body part. Cytosine, thymine and uracil are pyrimidine bases and have a single-ringed structure The conspiracy of a prize and a base forms a flux called a nucleoside. The accession 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 miscellany of other substances.

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