1. Nucleic Acids

4. Nucleotides: 3 parts 5-C sugar Phosphate Group Nitrogenous Bases A, T, C, G

5. Sing Along Songs - Row, Row, Row Your Boat We love DNA Made of nucleotides Sugar, Phosphate, and a base Bonded down one side Adenine with thymine make a lovely pair Cytosine without guanine would feel very bare.

6. 4 Nitrogenous Bases in DNA in RNA A = adenine T = thymine C = cytosine G = guanine A = adenine U =uracil (replaces T in DNA) C= cytosine G = guanine

7. DNA Base Pairing A – T (adenine with thymine) C – G (cytosine with guanine)

8. DNA and RNA -DNA is double stranded -Bases: A-T, C-G -Only in nucleus -Deoxyribose sugar -RNA is single stranded -Bases: A-U, C-G -In nucleus and in cytoplasm -Ribose sugar

9. Nitrogenous Bases Purines = two rings- AG (silver) Pyrimidines = CUT -one ring (pie)

10. Nitrogenous Base Why is it called a base? Remember NH 2 to NH 3 (picks up H+); it’s a weak base

11. Nucleoside Nitrogenous Base + Ribose Sugar (5-C) Check your Pattern Matching pp. 9-10

12. Nucleosides Uses in medicine as antiviral or anticancer agents Ribasphere-a nucleoside

13. Nucleotide: ribose sugar + phosphate+ nitrogenous base

14. Compare Nitrogenous Base with Nucleoside Guanine Nitrogenous Base Guanoside (nitrogenous base of guanine + ribose sugar)

15. SNEAK PREVIEW DNA molecule Sections of it are genes Genes are the codes that make specific amino acids that link together to make a protein

17. Hydrogen Bonds Join nucleotides together