1. Introduction to Biology Notes Mr. Ramirez

2. Biology The study of living organisms Topics include: ◦ Morphology ◦ Physiology ◦ Anatomy ◦ Distribution and Organization of Organisms

3. Why Biology? Almost anything in everyday life can be explained with the concepts we will learn in biology For example: ◦ Why do some animals only live in specific places? ◦ Why do we get sick? ◦ How can we cure the diseases that we have? ◦ Nutrition and Health

4. DNA DNA is molecule that falls into the category of nucleic acids DNA = Deoxyribonucleic Acid DNA is responsible for absolutely everything in all organisms – it is like a blueprint for a building

5. DNA—the mastermind DNA controls ◦ Our appearance ◦ Our predispositions ◦ What we will pass on to offspring Many of the diseases that humans have are a result of DNA that is damaged or mutated

7. DNA video https://www.youtube.com/watch?v=M4zHVRL Xkgw

8. Structure of DNA DNA is found in the nucleus of a cell

9. Structure of DNA DNA is composed of three things ◦ Sugar (Deoxyribose) ◦ Phosphate ◦ Base ◦ ALL three of these things together make a nucleotide

10. Nucleotide

11. Structure of DNA There are 4 types of bases ◦ Adenine ◦ Thymine ◦ Cytosine ◦ Guanine Adenine always bonds to Thymine Cytosine always bonds to Guanine