| A | B |
|---|
| polar molecule | A molecule with a positive and a negative end. |
| hydrogen bond | The attraction between opposite charges of hydrogen and oxygen in water. |
| diffusion | The net movement of molecules from a place of higher concentration to a place of lower concentration. |
| dynamic equilibrium | Continuous movement of particles into and out of a cell with no overall change in concentration. |
| polymer | A large molecule formed from a chain of smaller subunits. |
| carbohydrate | A molecule that is composed of carbon, hydrogen, and oxygen. (CH2O) |
| lipid | Another name for fats and oils. |
| protein | Large complex polymer composed of amino acids. |
| amino acid | The basic building blocks of proteins. |
| peptide bond | Covalent bond between amino acids in a protein molecule. |
| enzyme | A protein that changes the rate of a chemical reaction. |
| nucleic acid | Complex macromolecule that stores information in the form of a code. |
| nucleotide | Small subunits that chain together to make DNA and RNA. |
