| A | B |
|---|
| Neutrons | neutral parts of atom |
| Protons | positive parts of atom |
| electron | negative parts of atom |
| atomic number | number of protons |
| atomic mass | number of protons and neutrons |
| isotope | differing neutrons of same element |
| covalent bonds | sharing of electrons |
| ionic bonds | give and take electons |
| hydrogen bonds | weak attractions |
| polar molecule | unequal charges in molecule |
| organic molecule | has carbon in it |
| cohesion | tendency of molecules to stick to each other |
| adhesion | molecules tendency to stick to other things |
| surface tension | pulling of molecules to each other at the surface |
| Carbohydrate | made up of sacharrides |
| Lipids | made up of fatty acids |
| Proteins | made up of amino acids |
| Nucleic acids | made up of nucleotides |
| sugars | end in ose |
| enzymes | end in ase |
| activation energy | energy needed to start a reaction |
| endothermic reaction | energy is absorbed |
| exothermic reaction | energy is released |
| catalyst | lowers activation energy |
| biological enzyme | speeds up reaction in body |
| lock and key mechanism | substrates fit exactly |
| induced fit model | active site can change |
| inhibitor | something that slows a reaction down |
