1. Notes 3- Macromolecules

2. Review of Terms Molecule Two or more atoms joined by chemical bonds
Macromolecule
Large polymer made of repeating monomer units
Four types of macromolecules are important in living systems.

3. MACROMOLECULES OF LIFE
Found in all living things
Building blocks made up of the atoms: carbon, oxygen, hydrogen, nitrogen, phosphorus, and sulfur
There are 4 important types:
Carbohydrates  C, H, & O
Lipids  C, H, & O
Nucleic Acids  C, H, O, N, & P
Proteins  C, H, O, N, & S

4. 1. Carbohydrates Built with: sugars
Function: Provide energy and structural support
Foods: breads, cereals, vegetables, fruits, & seeds

5. 2.Lipids/Fats Built with: fatty acids
Functions: provides energy & structure, cushions the body, and prevents heat loss
Found in butter, margarine, candy

6. Saturated Fats has lots of hydrogen
solid at room temperature (beef, pork, chicken, dairy)
found in animal products
 can clog blood vessels!

7. Unsaturated Fats Liquid at room temperature (oils, nuts, & seeds)
found in plant products
Healthier for you!

8. 3. Nucleic Acids Atoms: C, H, O, N, P There are two types:
DNA (deoxyribonucleic acid)
RNA (ribonucleic acid)
Function: DNA directs & controls all activities of all cells in an organism – RNA helps

9. DNA –DeoxyriboNucleic Acid
DNA is the hereditary material passed on from parents to offspring. It’s your “genes”
Structure: double-stranded

10. RNA- Ribonucleic Acid
RNA helps the DNA
Structure: single-stranded

11. 4. Proteins Atoms: C, H, O, N, P, S Built of: amino acids
Function: Provide energy & structure, repairs body tissues
Some are hormones, enzymes, neurotransmitters, etc.