1. DNA Introduction

2. What is DNA? Genetic information of life Type of Nucleic Acid Double Stranded

3. What is each made of? THINK OF DNA AS BEING A LADDER Sides of the DNA molecule – Phosphate group and sugar (deoxyribose) Rungs of DNA molecule – Nitrogen bases

4. Shape and Who Proposed It Twisted double strand = DOUBLE HELIX James Watson and Francis Crick

5. Components Nucleotides make up a DNA molecule Nucleotides are made of three parts – Phosphate group – Sugar group (Deoxyribose) – Nitrogen base

6. Whats What?

7. Types of Nitrogen Bases in DNA Purine Bases (made of 2 rings) – Adenine (A) – Guanine (G) Pyrimidine Bases (made of one ring) – Cytosine (C) – Thymine (T) ONLY FOUND IN DNA – Uracil (U) ONLY FOUND IN RNA

9. Pairing of Nitrogen Bases (forms rungs of ladder) In DNA Strand A bonds with T G bonds with C BONDED BY HYDROGEN BONDS

11. RNA and DNA

12. YOUR MODEL