* Carbs
Elements C(1):H(2):O(1)
Stored in carbs

** Roles of carbs
*** Monosacharide - glucose
*** Disacharides - two bonded monosacharide,  e.g. sucrose

| starch    | found in plants        |
| glycogen  | found in animal tissue |
| cellulose |                        |


* Fats
Elements C,H,O

** Saturated, unsaturated fatty acids
| Saturated   | saturated w/ H (at every carbon bond) | only single bonds between carbons           | solid @ room temp  | comes from animals primarly |
| Unsaturated | not saturated w/ H                    | one or more double bonds (geometry changes) | liquid @ room temp | comes from plants primarily |

* Proteins (Polypeptides)
Monomer = Amino Acid
Elements C,H,O,N

Chains of amino acids

Proteins can lose shape & function (denatured) - shape determines function

** 4 cal / g
** Elements C,H,O,N
** Diverse, complex