1. DNA

2. Why Important Understanding of birth defects Viral diseases Cancer Aging Genetic engineering Criminal investigations

3. Most Important Makes up our genetic code Production of proteins

4. Page 286

5. What is DNA? Genetic material of living things In the nucleus Stands for deoxyribonucleic acid Consists of three parts Nitrogen base, 5 carbon sugar, Phosphate group

6. Page 288

7. Nitrogen Bases in DNA Four bases Adenine (A) Guanine (G) Thymine (T) Cytosine (C)

8. Divided into two groups Purines Adenine Guanine Pyrimidines Thymine Cytosine

9. Page 288

11. Certain Arrangement A = T G =C T = A C =G Called complementary base pairs

12. Double Helix 1953, James Watson and Francis Crick published a journal article that was only one page in length One of the most monumental Also very controversial Determined shape by X-ray