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Nucleic Acids

Understand the structure of nucleic acids - DNA and RNA - which are composed of long chains of nucleotides consisting of phosphate groups, pentose sugar, and nitrogenous bases such as adenine, thymine, uracil (in RNA), cytosine, and guanine. Learn about the nucleotide structure and the double helix structure of DNA.

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Nucleic Acids

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  1. Nucleic Acids

  2. Nucleic acids • Two types: a. Deoxyribonucleic acid (DNA-double helix) b. Ribonucleic acid (RNA-single strand) • Nucleic acidsare composed of long chains ofnucleotides

  3. Nucleotides • Parts: phosphate group pentose sugar (5-carbon) nitrogenous bases: adenine (A) thymine (T) DNA only uracil (U) RNA only cytosine (C) guanine (G)

  4. Nucleotide Structure Phosphate Group O O=P-O O C5H2 O N Nitrogenous base (A, G, C, or T) C1 C4 Sugar (deoxyribose) C3 C2

  5. 5 O 3 3 O P P 5 5 C O G 1 3 2 4 4 2 1 3 5 O P P T A 3 5 O O 5 P P 3 DNA - double helix

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