AP Biology
Terms : Hide Images
| 6716234114 | activation energy | The amount of energy needed to push the reactants over an energy barrier. |  | 0 |
| 6716234115 | enzyme-substrate complex | When an enzyme binds to its substrate, it forms: |  | 1 |
| 6716234116 | active site | A pocket or groove on the surface of the enzyme. |  | 2 |
| 6716234117 | competitive inhibitors | Reduce the productivity of enzymes by blocking substrates from entering active sites. |  | 3 |
| 6716234118 | noncompetitive inhibitors | Impede enzymatic reactions by binding to another part of the enzyme (other than the active site). |  | 4 |
| 6716234119 | allosteric regulation | When a protein's function at one site is affected by the binding of a regulatory molecule to a separate site. |  | 5 |
| 6716234120 | feedback inhibition | A metabolic pathway is switched off by the inhibitory binding of its end product to an enzyme that acts early in the pathway. |  | 6 |
| 6716234121 | keystone species | A plant or animal that plays a unique and crucial role in the way an ecosystem functions. |  | 7 |
| 6716234122 | cellulose | Carbohydrate component of plant cell walls. |  | 8 |
| 6716234123 | starch | Storage polysaccharide of plants. |  | 9 |
| 6716234124 | glycogen | Extremely branched polymer of glucose. |  | 10 |
| 6716234125 | -ose | Suffix of a sugar. |  | 11 |
| 6716234126 | steroids | Made of 4 rings of carbon. |  | 12 |
| 6716234127 | peptide bond | Bonds that connect amino acids. |  | 13 |
| 6716234128 | disulphide bridges | Reinforce tertiary structure. |  | 14 |
| 6716234129 | primary structure | Chain of amino acids. |  | 15 |
| 6716234130 | secondary structure | Either an alpha helix or beta pleated sheet. |  | 16 |
| 6716234131 | tertiary structure | Results from interactions between side chains. |  | 17 |
| 6716234132 | quaternary structure | Results from 2 or more polypeptide subunits. |  | 18 |
| 6716234133 | phosphodiester bonds | Bonds between phosphate group and pentose sugar in nucleic acids. |  | 19 |
| 6716234134 | dehydration synthesis | Condensation reaction where molecules are connected by loss of a water molecule. |  | 20 |
| 6716234135 | hydrolysis | Breaking down complex molecules by the chemical addition of water. |  | 21 |
| 6716234136 | glycosidic linkage | A covalent bond formed between two monosaccharides by a dehydration reaction. |  | 22 |
| 6716234137 | species richness | The number of different species in a community. |  | 23 |
| 6716234138 | species diversity | The number and relative abundance of species in a community. |  | 24 |
| 6716234139 | exponential growth | Growth of a population in an ideal, unlimited environment, represented by a J-shaped curve. |  | 25 |
| 6716234140 | logistic growth | Growth pattern in which a population's growth rate slows or stops following a period of exponential growth, forming an S-shaped curve. |  | 26 |
| 6716234141 | carrying capacity (K) | Maximum population of a particular species that a given habitat can support over a given period. |  | 27 |
| 6716234142 | limiting factors | Any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms. |  | 28 |
| 6716234143 | density dependent factors | A limiting factor of a population wherein large, dense populations are more strongly affected than small, less crowded ones. |  | 29 |
| 6716234144 | density independent factors | Limiting factor that affects all populations in similar ways, regardless of population size. |  | 30 |
| 6716234145 | r-selection | Also called density-independent selection. Characterized by many offspring with little or no parental care. |  | 31 |
| 6716234146 | K-selection | Also called density-dependent selection. Characterized by few offspring with little or much parental care. |  | 32 |
| 6716234147 | type I survivorship | Usually experience high survival in early and middle life, followed by a rapid decline in later life. Usually K-selected |  | 33 |
| 6716234148 | type II survivorship | Experience roughly a constant mortality rate regardless of age. Prey animals such as birds can follow this pattern of survival. |  | 34 |
| 6716234149 | type III survivorship | Experience the greatest mortality early on in life, with relatively low rates of death for those surviving. Usually r-selected. |  | 35 |
| 6716234150 | age distribution | A model used in population geography that describes the ages and number of males and females within a given population. |  | 36 |
