| A | B |
|---|
| atom | the smallest unit of an element that maintains the properties of that element |
| lipid | a fat molecule or a molecule that has simillar properties : examples include oils, waxes and steroids |
| nucleic acid | a molecule made up of sub units called nucleotides |
| element | a substance that cannot be separated or broken down into simpler substances by chemicmeansal |
| protein | a molecule that is made up of amino acids and that is needed to build and repair body |
| cell theory | the theory that states that all living things are made up of cells, that cells are the basic units of organisms, that each cell in a multicellular organism has a specific job, and that cells come only by existing cells |
| organic compound | a covalently bonded compound that contains carbon |
| carbohydrate | a class of molecules that includes sugars, starches, and fiber: contains carbon, hydrogen and oxygen |
