| A | B |
|---|
| DNA | molecule that encodes genetic information and determines the structure, function, and metabolic activities of the cell. |
| cell | structural and functional unit of all living organisms |
| homeostasis | regulation of the internal environment to maintain a stable, constant condition, by means of multiple adjustments, controlled by coordinated mechanisms. |
| metabolism | biochemical modification of chemical compounds in living organisms and cells to carry out the processes of life |
| scientific hypothesis | suggested testable explanation of a phenomenon (observable event) or reasoned proposal suggesting a possible correlation between multiple phenomena (observable events) |
| atom | the smallest possible particle of a chemical element that retains its chemical properties |
| chemical bond | chemical energy that holds together the atoms of a molecule (or compound) |
| ion | an atom that has gained or lost one or more electrons |
| ionic bond | chemical bond formed by the attraction between oppositely charged ions |
| covalent bond | joining of two atoms when they share one or more pairs of electrons |
| polar covalent bond | when atoms share pairs of elections, but one atom pulls harder (has more protons) so the shared electrons spend more time orbiting that atom. |
| hydrogen bond | A weak attraction between an atom (or molecule) & a hydrogen atom that is already taking part in a covalent bond |
| organic molecule | a carbon-based molecule made by living cells |
| lipid | hydrophobic organic molecule |
| hydrophilic | having a strong attraction to water |
