1. Four classes of organic compounds: Carbohydrates Proteins Lipids
3.3 Molecules of Life pp
Four classes of organic compounds:
Carbohydrates
Proteins
Lipids
Nucleic Acids

2. *Four classes of organic compounds: *Carbohydrates
3.3 Molecules of Life pp
*Four classes of organic compounds:
*Carbohydrates
Carbon, hydrogen, & oxygen
Sugars, starches
*Store energy in muscle & liver
*Monomer is monosaccharide
*Polymer is polysaccharide
In animals it is glycogen
In plants it is starch or cellulose
Can you name some carbohydrates?
How many sugar molecules in a disaccharide?
Saccharide = sugar

4. Monomer
polymer

5. *Polymer is polypeptide
3.3 Molecules of Life pp
2. *Proteins
C, O, H, N
Skin, muscle, and enzymes
*Structure of body, tools to do *specific jobs in body, and stores energy
*Monomer is amino acid
20 different amino acids
*Polymer is polypeptide
Peptide bond is O=C-N-H
Enzymes are proteins that do a specific *job determined by the SHAPE
Can you name some proteins?
What determines the job a protein does?

9. Long C & H chains that are *non-polar with a polar end containing O
3.3 Molecules of Life pp
*Lipids
Mostly C and H, little bit of O
Fats, oils, steroids, hormones
*Store energy (twice carbs or protein), *membranes, and signals between cells
Long C & H chains that are *non-polar with a polar end containing O
Polar end is hydrophilic = “water loving”
Non-polar end is hydrophobic= “water hating”
Monomer is fatty acid
Polymer is fat molecule
Explain how fat is good?

13. *Monomer = nucleotides, there are 5 of them *Polymer = DNA or RNA
3.3 Molecules of Life pp
*Nucleic Acids
Sugar plus Nitrogen base and phosphate group
*DNA & RNA
*Stores information (genetic code)
*Monomer = nucleotides, there are 5 of them
*Polymer = DNA or RNA
DNA = deoxyribonucleic acid
RNA = ribonucleic acid
How are DNA and RNA different?

15. Monomer
polymer