Biology Module #5

5. Breaking down complex molecules by the chemical addition of water.
7. A measurement of how much solute exists in a certain volume of solvent.
10. Lacking any affinity to water.
12. A collection of atoms that all have the same number of protons.
13. A membrane that allows some molecules to pass through but does not allow other molecules to pass through.
14. An explanation or representation of something that cannot be seen.
17. The random motion of molecules from an area of high concentration to an area of low concentration.
18. A lipid made from fatty acids that have at least one double bond between carbon atoms.
20. The process by which living organisms produce larger molecules from smaller ones.
21. Anything that has mass and takes up space.
22. A lipid made from fatty acids that have no double bonds between carbon atoms.
25. A strong attraction between hydrogen atoms and certain other atoms, usually oxygen or nitrogen, in specific molecules.

1. Carbohydrates that are made up of more than two monosaccharides.
2. A chemical reaction in which molecules combine by removing water.
3. Simple carbohydrates that contain 3 to 10 carbon atoms.
4. The tendency of a solvent to travel across a semipermeable membrane into areas of higher solute concentration.
6. Chemicals that result from atoms linking together.
8. A molecule that contains only carbon and any of the following: hydrogen, oxygen, nitrogen, sulfur, and or phosphorus.
9. A change that alters the makeup of the elements or molecules of a substance.
11. A change that affects the appearance but not the chemical makeup of a substance.
15. A substance that alters the speed of a chemical reaction but is not used up in the process
16. A bond that links amino acids together in a protein.
19. Carbohydrates that are made up of two monosaccharides.
23. Two different molecules that have the same chemical formula.
24. One of three forms-- solid, liquid, or gas-- which every substance is capable of attaining.