1. Chemistry of Life

2. Nucleic Acids They are macromolecules that are important to cells because of their role in the storage, transmission, and expression of genetic information.

3. Nucleic Acids They can be either Deoxyribonucleic Acid (DNA) or Ribonucleic Acid (RNA).

4. Johann Friedrich Miescher Johann Meischer was a Swiss chemist who discovered nucleic acids in the late 19 th century from examining white blood cells found in pus.

5. Nucleotides They are simple units of nucleic acids connected to form long chains.

6. Parts of Nucleotides Nitrogenous bases –Purines or Pyrimdines 5 carbon sugar –Ribose or Deoxyribose Phosphate group (P)

7. Nitrogenous Bases Purines Adenine (A) Guanine (G) –pure As Gold Pyrimdines Cytosine (C) Uracil (U) Thymine (T) C U T the py

8. 5 Carbon Sugar

9. Phosphate Group

10. Genetic Coding in Cells James Watson and Francis Crick Who are these guys?

11. James Watson and Francis Crick Published a short scientific paper proposing a model for the structure of DNA. (Deoxyribonucleic Acid) Model was based on the principle of specific nucleotide pairing. They created a model for the structure of DNA.

12. Nitrogen Base Pairing in DNA Hydrogen bonds determine nitrogen base pairing Adenine (A)  Thymine (T) Cytosine (C)  Guanine (G)

13. Function of DNA Passes genetic information from parent to offspring Is the code from which protein is synthesized ex: eye color, hair color, etc.

14. DNA DNA forms genes, which is a unit of genetic information that codes for a specific product. It stores information in a code consisting of units 3 nucleotides long called triplet codons. Certain codons are translated by the cell to mean certain amino acids that eventually make proteins.