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| 12031710329 | Isomers | molecules that have the same molecular formula but different structures | 0 | |
| 12031722332 | Structural isomers | differ in the covalent arrangements of their atoms | 1 | |
| 12031730483 | cis-trans isomers | carbons have covalent bonds to the same atoms, but these atoms differ in their spatial arrangements due to the inflexibility of double bonds | 2 | |
| 12031741430 | Enantiomers | have the same covalent arrangement and spatial arrangement but are mirror images of each other | 3 | |
| 12031774400 | Hydroxyl group | -OH | 4 | |
| 12031781042 | Hydroxyl group |  | 5 | |
| 12031811728 | Carbonyl group |  | 6 | |
| 12031821692 | Carboxyl group |  | 7 | |
| 12031830277 | Amino Group |  | 8 | |
| 12031839843 | Sulfhydryl Group |  | 9 | |
| 12031849190 | Phosphate group |  | 10 | |
| 12031858180 | Methyl Group |  | 11 | |
| 12031897895 | Polymer | A long molecule consisting of many similar or identical monomers linked together. | 12 | |
| 12031903076 | Monomer | small chemical unit that makes up a polymer | 13 | |
| 12031912780 | dehydration reaction | A chemical reaction in which molecules combine by removing water | 14 | |
| 12031917902 | hydrolysis reaction | A chemical reaction that breaks apart a larger molecule by adding a molecule of water | 15 | |
| 12031929435 | Carbohydrates | sugars and polymers of sugars | 16 | |
| 12031944490 | Monosaccharides | Single sugar molecules | 17 | |
| 12031958942 | glycosidic linkage | A covalent bond formed between two monosaccharides by a dehydration reaction. | 18 | |
| 12031968161 | Polysacchardies | the polymers of sugars | 19 | |
| 12031975081 | starch | A storage polysaccharide in plants consisting entirely of glucose. | 20 | |
| 12031979643 | glycogen | storage polysaccharide in animals | 21 | |
| 12031995052 | Cellulose | Carbohydrate component of plant cell walls. | 22 | |
| 12032000471 | Chitin | A structural polysaccharide found in many fungal cell walls and in the exoskeletons of all arthropods. | 23 | |
| 12032014031 | Lipids | Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen. | 24 | |
| 12032020934 | Fats | lipid made of glycerol and fatty acids whose major function is energy storage | 25 | |
| 12032035527 | Ester linkage | the bond between a fatty acid and a glycerol that forms a lipid | 26 | |
| 12032065070 | Phospholipid | a lipid that contains phosphorus and that is a structural component in cell membranes | 27 | |
| 12032069800 | hydrophobic | water fearing | 28 | |
| 12032075300 | Hydrophilic | water loving | 29 | |
| 12032084518 | Steroids | lipids characterized by a carbon skeleton consisting of four fused rings | 30 | |
| 12032089715 | Cholesterol | an important steroid which is a component in animal cell membranes | 31 | |
| 12032112895 | Protein | macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed for a large variety of functions | 32 | |
| 12032143386 | enzymatic proteins | selective acceleration of chemical reactions | 33 | |
| 12032174755 | Defensive proteins | protection against disease | 34 | |
| 12032182184 | Storage proteins | storage of amino acids | 35 | |
| 12032193794 | Transport proteins | membrane proteins that help move substances across a cell membrane | 36 | |
| 12032200977 | hormonal proteins | coordination of an organism's activities | 37 | |
| 12032208033 | receptor proteins | response of cell to chemical stimuli | 38 | |
| 12032213200 | motor proteins | A protein that interacts with cytoskeletal elements and other cell components, producing movement of the whole cell or parts of the cell. | 39 | |
| 12032218570 | structural proteins | to support | 40 | |
| 12032223602 | amino acids | building blocks of proteins | 41 | |
| 12032230400 | peptide bond | The chemical bond that forms between the carboxyl group of one amino acid and the amino group of another amino acid | 42 | |
| 12049229915 | polypeptide | A polymer (chain) of many amino acids linked together by peptide bonds. | 43 | |
| 12049236119 | primary structure | sequence of amino acids in a polypeptide chain | 44 | |
| 12049238019 | secondary structure | hydrogen bonding of the peptide backbone causing coils and folds in the polypeptide chain | 45 | |
| 12049244288 | tertiary structure | Results from interactions between side chains (R groups). | 46 | |
| 12049248474 | quaternary structure | results from interactions between multiple polypeptide chains | 47 | |
| 12049253344 | nucelic acids | macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus | 48 | |
| 12049300316 | DNA | A complex molecule containing the genetic information that makes up the chromosomes. | 49 | |
| 12049318149 | RNA | single-stranded nucleic acid that contains the sugar ribose | 50 | |
| 12049320354 | Nucleotide | monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base | 51 | |
| 12049321908 | Pyrimidines | cytosine, thymine, uracil | 52 | |
| 12049321909 | Purines | Adenine and Guanine | 53 |
