1. The Building Blocks of Life
Section 6.4

2. I. Organic Chemistry
Carbon is a component of almost all biological molecules
Has 4 electrons in outermost energy level
Can form 4 covalent bonds
Shape: straight chains, branched chains and rings

3. II. Macromolecules Macromolecules Macro= large
Large molecules formed by joining smaller organic molecules together
Polymers
Poly= many
Meros= part
Molecules made from repeating units of identical or nearly identical compounds
Linked together by a series of covalent bonds

4. III. Types of macromolecules
Carbohydrates
Store energy
Provide structural support
Examples: glucose (mono) and sucrose (di)

5. III. Types of macromolecules
Proteins
Transport substances
Speed reactions
Provide structural support
Make hormones
Example: Keratin and collagen

6. III. Types of macromolecules
C. Lipids
Fats
Store energy
Provide barriers
Examples: oils, waxes, phospholipids

7. III. Types of macromolecules
Nucleic acids
Store and communicate genetic information
Example: DNA (deoxyribonucleic acid)

8. 1. Which element do almost all biological molecules contain?
2. What type of biological molecule is an enzyme? 3. What are fats, oils, and waxes composed of? 4 What biological molecule transports substances between cells? .

10. 3. What are fats, oils, and waxes composed of?

11. 4 What biological molecule transports substances between cells? .

12. Answers:
Carbon
Protein
Lipids
proteins