Biology Module 3

3. The two-layer orientation of the cell membrane made up of phospholipids.
5. Cells that contain a nucleus and membrane-bound organelles.
6. The types of lipid which make up the cell membrane.
10. A solution whose concentration has a higher concentration of solute than inside the cell.
11. Deoxyribonucleic acid; DNA.
12. The barrier around all cells which protects them from the outside world.
15. Organisms that have more than one cell.
16. The property of a membrane to only allow certain substances to pass across it. (Some things can pass through.)
22. The study of cells.
24. The difference in the concentration of molecules on one side of a membrane as compared to the other side.
25. A storage "sack" in the cytoplasm that holds food or wastes.
26. The state of being equal or even.

1. The theory that cells are the basic units of structure and function for all life.
2. Cells that don't have a nucleus nor any membrane-bound organelles.
4. The cell membrane is flexible and has lots of proteins in it.
7. Organisms that have only one cell.
8. Units inside all cells which perform certain functions/tasks.
9. A protective layer that surrounds the cell membrane.
13. Requires the cell to use energy in order to move molecules across the membrane.
14. A solution whose concentration of solute is the same as inside the cell.
17. A solution whose concentration of solute is lower than inside the cell.
18. A mode of transport that does not require the cell to use any energy.
19. The process of making molecules by using absorbed molecules.
20. Molecules which dissolve in water; "water loving."
21. Molecules which do not dissolve in water; "water fearing."
23. The movement of molecules from an area of higher concentration to an area of lower concentration.