1. Nucleic Acids Into to DNA

2. Video http://youtu.be/zwibgNGe4aY

3. DNA Genetic information Deoxyribnucleic acid (DNA) – Stored in the nucleus of the cell – a polymer made up of nucleotides

4. Nucleotides Building block of nucleic acids The monomer of nucleic acids – Only 4 types – Made up of 3 parts Sugar Phosphate group Nitrogenous base

5. 4 types of nucleotides Pyrimidines Thymine (T) Cystine (C) Purines Adenine (A) Guanine (G) Single-ring structureDouble-ring structure Differ only in the nitrogenous bases

6. Nucleotides Joined together by a covalent bond between sugar and phosphate group – Backbone – Nitrogenous bases line up along backbone

7. Nucleotides Polymers can form many different sequences – Vary in sequence & length – Unlimited possible combinations

8. The Double Helix Watson and Crick – Created the model – 2 strands wound about each other – This twisted shape known as the Double Helix

9. Double Helix Sugar-phosphate group is on the outside Nitrogenous bases are on the inside forming hydrogen bonds Watson & Crick realized the pairs were purposeful – Based on size and ability to form a bond

10. Double Helix Purines bind with the pyrimidines – Adenine  ThyamineA—T – Guanine  CystosineG—C Called complementary bases