I. Chemical Compounds in Cells
• An element is any substance that cannot be broken down into simpler substances.
• The smallest unit of an element is an atom.
• Example of an element is carbon.
• A compound is two or more elements that are chemically combined.
• The smallest unit of a compound is a molecule.
• An example of a compound is water.
C. Organic and Inorganic Compounds
• Inorganic compounds do not contain carbon.
• Organic compounds contain carbon and hydrogen and usually are associated
with living things.
Four groups of Organic Compounds
Carbohydrates Lipids Proteins Nucleic Acids
Made of the Made of the Made of the elements Made of the elements
elements carbon, elements carbon, carbon, oxygen, carbon, oxygen,
hydrogen, and hydrogen, and hydrogen, nitrogen,and hydrogen, nitrogen,
oxygen oxygen sulfur and phosphorus
Supply energy for Store large Regulate cell processes Carry hereditary
cell processes, amounts of and build cell information; used to
form plant energy long term; structures make proteins
structures; short- form boundaries
term energy around cells
Sugars-fruits, Fats, oils, waxes, Enzymes, skin, and DNA and RNA
starch-pasta, and phospholipids, hair
cellulose-found in and cholesterol
cell walls of