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Published byTheodora Barnett Modified over 8 years ago
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THE NUCLEIC ACIDS © 2007 Paul Billiet ODWSODWS
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Friedrich Miescher in 1869 isolated what he called nuclein from the nuclei of pus cells Nuclein was shown to have acidic properties, hence it became called nucleic acid © 2007 Paul Billiet ODWSODWS
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Two types of nucleic acid are found Deoxyribonucleic acid (DNA) Ribonucleic acid (RNA) © 2007 Paul Billiet ODWSODWS
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NUCLEIC ACID STRUCTURE Nucleic acids are polynucleotides Their building blocks are nucleotides © 2007 Paul Billiet ODWSODWS
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NUCLEOTIDE STRUCTURE PHOSPATESUGAR Ribose or Deoxyribose NUCLEOTIDE NITROGENOUS BASE Adenine (A) Guanine(G) Cytocine (C) Thymine (T) Uracil (U) © 2007 Paul Billiet ODWSODWS
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The Double Helix (1953) © Dr Kalju Kahn USBC Chemistry and Biochemistry Public Domain image
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