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Intro to dna
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Transcript

  • 1. Intro to DNA
  • 2. Nucleic Acids
    • Composed of carbon, oxygen, hydrogen, nitrogen, and phosphorus
    • Their structural unit, the nucleotide, is composed of N-containing base, a pentose sugar, and a phosphate group
  • 3. Nucleic Acids
    • Five nitrogen bases contribute to nucleotide structure – adenine (A), guanine (G), cytosine (C), thymine (T), and uracil (U)
    • Two major classes – DNA and RNA
  • 4. Deoxyribonucleic Acid (DNA)
    • Double-stranded helical molecule found in the nucleus of the cell
    • Replicates itself before the cell divides, ensuring genetic continuity
    • Provides instructions for protein synthesis
  • 5. Structure of DNA Figure 2.22a
  • 6. Structure of DNA Figure 2.22b