Biology Ch 1.1, 1.2, 2

1. The smallest unit that can perform all life processes
4. The attractive force between two bodies of different substances that are in contract with each other
6. molecular subunit of a polymer
12. a class of molecules that includes sugar, starches, and fiber
13. Substance that has a molecular structure consisting of a large number of similar units bonded together
15. All organisms and the part of Earth where they exist
16. An atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge
17. In a solution, the substance that dissolves in the solvent
18. In a solution, the substance in which the solute dissolves
19. A molecule that acts as a catalyst in biochemical reaction

2. A fat molecule that has similar properties
3. A substance consisting of atoms or ions of two or more elements that are chemically bonded together
5. The smallest unit of an element
6. The sum of all chemical processes that occur in an organism
7. A community of organisms and their abiotic environment
8. A living thing
9. A substance that cannot be decomposed into simpler substances by chemical means
10. The force that holds molecules of a single material together
11. A substance that forms in a chemical reaction
14. Measurement of acidity