Cells

3. the movement of ions and molecules across membranes
4. any of a class of organic compounds that are fatty acids or their derivatives and are insoluble in water but soluble in organic solvents
6. the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy
7. any of a large group of organic compounds occurring in foods and living tissues and including sugars, starch, and cellulose
9. the smallest structural and functional unit of an organism
12. a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one

1. Any process that is carried out at the cellular level, but not necessarily restricted to a single cell
2. any of a class of nitrogenous organic compounds that consist of large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms
5. a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.
8. a complex organic substance present in living cells, especially DNA or RNA, whose molecules consist of many nucleotides linked in a long chain
10. the tendency toward a relatively stable equilibrium between interdependent elements
11. the movement of substances (as by diffusion) across a cell membrane without the expenditure of energy