| A | B |
|---|
| molecule | two or more atoms held together by covalent bonds |
| macromolecule | Large molecule made up of smaller molecules |
| carbohydrates | molecule composed of carbon, hydrogen, and oxygen; includes sugars and starches |
| lipid | nonpolar molecule composed of carbon, hydrogen, and oxygen; includes fats and oils |
| protein | polymer composed of amino acids linked by peptide bonds |
| Nucleic acid | polymer of nucleotides; the genetic material of organisms |
| enzyme | protein that catalyzes chemical reactions for organisms |
| adhesion | attraction between molecules of different substances |
| cohesion | attraction of molecules of the same substance |
| carbon | Basis of most molecules that make up living things |
| ph | Measurement of acidity or positive hydrogen ion concentration |
