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| 11693909882 | atom | smallest part of an element | 0 | |
| 11693909883 | proton | positive charge, in nucleus | 1 | |
| 11693909884 | neutron | no charge, in nucleus | 2 | |
| 11693909885 | electron | negative charge, outside nucleus | 3 | |
| 11693909886 | valence electrons | electrons in outermost shell, able to interact | 4 | |
| 11693909887 | octet rule | states that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons | 5 | |
| 11693909888 | atomic number | number of protons | 6 | |
| 11693909889 | atomic mass | number of protons + neutrons | 7 | |
| 11693909890 | isotopes | different forms of same element - same number of protons, different number of neutrons | 8 | |
| 11693909891 | ions | atoms that have gained or lost electrons | 9 | |
| 11693909892 | cations | positively charged (lost electrons) | 10 | |
| 11693909893 | anions | negatively charged (gained electrons) | 11 | |
| 11693909895 | covalent bond | bond formed by sharing of electrons | 12 | |
| 11693909896 | polar bond | covalent bond in which electrons are shared unevenly | 13 | |
| 11693909897 | nonpolar bond | covalent bond where electrons are shared evenly | 14 | |
| 11693909898 | hydrophilic | water loving | 15 | |
| 11693909899 | hydrophobic | water fearing | 16 | |
| 11693909900 | hydrogen bond | strongest interaction between molecules - forms with polar molecules | 17 | |
| 11693909902 | cohesion | water sticks to itself | 18 | |
| 11693909903 | adhesion | water sticks to other polar molecules (capillary action) | 19 | |
| 11693909904 | heat storage | water requires a lot of heat to disrupt hydrogen bonds | 20 | |
| 11693909905 | ice formation | water is less dense as solid than liquid | 21 | |
| 11693909906 | universal solvent | water is able to dissolve many materials (polar materials) | 22 | |
| 11693909915 | monomers | small building blocks of polymers | 23 | |
| 11693909916 | polymers | chains of monomers | 24 | |
| 11693909917 | dehydration synthesis | reaction used in building polymers that will release water | 25 | |
| 11693909918 | hydrolysis | reaction used in breaking polymers that uses water | 26 | |
| 11693909919 | function of carbohydrate | short term energy, building material | 27 | |
| 11693909920 | glucose | monosaccharide, used for energy | 28 | |
| 11693909921 | disaccharide | two monosaccharides linked together | 29 | |
| 11693909922 | polysaccharide | many monosaccharide units | 30 | |
| 11693909926 | lipid | Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen. |  | 31 |
| 11693909927 | phospholipid | fat found in cell membrane, hydrophobic + hydrophilic ends |  | 32 |
| 11693909928 | definition of proteins | long chain of amino acids (polypeptide) | 33 | |
| 11693909944 | amino acid | Building blocks of protein |  | 34 |
| 11693909945 | primary protein structure | sequence of amino acids |  | 35 |
| 11693909946 | secondary protein structure | coiling or folding of a polypeptide due to H-bonding between amino acids |  | 36 |
| 11693909947 | tertiary protein structure | occurs when certain attractions are present between alpha helices and pleated sheets |  | 37 |
| 11693909948 | quaternary protein structure | 2+ protein chains forming functional protein |  | 38 |
| 11693909930 | peptide bond | bond between amino acids formed by dehydration reaction | 39 | |
| 11693909931 | enzymes | protein that increase reaction rate by lowering activation energy | 40 | |
| 11693909932 | nucleic acids | DNA, RNA - made up of nucleotides | 41 | |
| 11693909933 | DNA | deoxyribonucleic acid - genetic material | 42 | |
| 11693909935 | nucleotide | monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base |  | 43 |
| 11693909936 | RNA | ribonucleic acid - intermediate of DNA and proteins | 44 | |
| 11693909937 | ATP | energy in the cell | 45 | |
| 11710704179 | Substrate | reactant of an enzyme-catalyzed reaction | 46 |
