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Nucleotides

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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Nucleotides

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  1. Nucleotides

  2. 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)

  3. 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)

  4. 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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