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Nucleotides. Nucleotides. DNA very large molecule “polymer” DNA made of repeating subunits called? Nucleotides Nucleotides have three parts Sugar Phosphate group Nitrogenous base Simple sugar in DNA is called? Deoxyribose Phosphate group – (sketch it p. 282)

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slide2

Nucleotides

  • DNA very large molecule “polymer”
  • DNA made of repeating subunits called?
  • Nucleotides
  • Nucleotides have three parts
    • Sugar
    • Phosphate group
    • Nitrogenous base
  • Simple sugar in DNA is called?
  • Deoxyribose
  • Phosphate group – (sketch it p. 282)
    • composed of 1 P (Phosphorous) surrounded by 4 O (oxygen)
  • Nitrogenous base – Carbon (C)that contains 1 or more N (Nitrogen)
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Nucleotides

  • What are the names of the 4 Nitrogenous Bases ?
    • Guanine (G)
    • Thymine (T)
    • Adenine (A)
    • Cytosine (C)
  • Sketch each nitrogenous base (p. 282 /Honors p. 198)
  • Nucleotidesjoin together to form long chains
  • Phosphate group – Deoxyribose (sugar) – Nitrogenous base
  • Phosphorous & Deoxyribose form the “BACKBONE” of DNA
  • Nitrogenous bases stick out like teeth of a “zipper”
  • Adenine = Thymine “always”
  • Guanine = Cytosine “always”
  • Purines: Adenine & Guanine (double rings of carbon)
  • Pryimidines: Thymine & Cytosine (single ring of carbon)
nitrogen bases nucleotides
Nitrogen Bases &Nucleotides
  • Use the textbook illustration (p. 282/ Honors p. 198)
  • The paper should be held horizontally
  • Count & Collect the # of pentagons, hexagons, & elements needed to make the nitrogen bases
  • BE sure to attach the elements (O, C, H, & P) to the correct position on the compounds
  • Include the double bonds & make sure to put elements in the appropriate position
  • Glue the titles Purines & Prymidines on to your paper
  • Classify the nitrogen bases in a group with either Purines & Prymidines
  • Make each of the nitrogen bases with your supplies
  • Glue the nitrogen base TITLES above each of the appropriate nitrogen bases: adenine, guanine, thymine, & cytosine
  • Create a NUCLEOTIDE: illustrate aphosphate group & deoxyribose(pentagon) & attach it to ONE of the NITROGEN BASES to the sugar (p.282 / 197)
  • Label the phosphate, deoxyribose, & the nitrogen base in the nucleotide
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