| A | B |
|---|
| monomer | smaller unit of a macromolecule |
| polymer | several monomers joined together |
| carbohydrate | main source of energy |
| monosaccharide | single sugar molecule |
| polysaccharide | many monosaccharides together |
| lipid | used to store energy |
| nucleic acid | store and transmit genetic information |
| nucleotide | monomer of nucleic acid |
| chemical reaction | process that changes one set of materials into another |
| protein | control the rate of reactions, and regulate cell processes |
| amino acid | monomer of protein |
| reactant | the elements or compounds that enter into a chemical reaction |
| product | the chemicals or compounds that result from a reaction |
| activation energy | the energy needed to get a reaction going |
| catalyst | any substance that speeds the rate of a reaction |
| enzyme | a biological catalyst |
| substrate | the reactants in an enzyme catalyzed reaction |
