1. The Cell Membrane Cell Stuctures I Cell Structures II Cell Structures III Cellular Organization 5 pt 5 pt 5 pt 5 pt 5 pt 10 pt 10 pt 10 pt 10 pt 10 pt 15 pt 15 pt 15 pt 15 pt 15 pt 20 pt 20 pt 20 pt 20 pt 20 pt 25 pt 25 pt 25 pt 25 pt 25 pt

2. The process by which molecules move from an area of high concentration to an area of lower concentration.

3. What is… diffusion?

4. The property of biological membranes that allows some molecules to pass through while keeping other molecules out

5. What is selectively permeable?

6. The diffusion of water across a selectively permeable membrane.

7. What is osmosis ?

8. A solution containing roughly the same concentration of dissolved particles or solutes as are contained inside a cell.

9. What is… isotonic ?

10. A solution containing a lower concentration of dissolved particles or solutes than are contained inside a cell.

11. What is hypotonic?

12. The organelle that controls most of the processes in the cell & contains the cell’s genetic material.

13. What is…the nucleus?

14. The jellylike material inside the plasma membrane in which cell structures are embedded.

15. What is the cytoplasm?

16. The flexible boundary between a cell and its external environment.

17. What is…the cell membrane?

18. These small structures made of RNA and proteins are the sites where proteins are assembled.

19. What are ribosomes?

20. Stacks of membranes where lipids and carbohydrates are added to proteins.

21. What is the Golgi Apparatus?

22. An organelle used to convert sunlight energy into food molecules during the process of photosynthesis.

23. What is… a chloroplast ?

24. Known as the “powerhouse of the cell,” this organelle converts food molecules into energy that is usable by cells.

25. What are mitochondria ?

26. A sac surrounded by a membrane where fluid, proteins, carbohydrates, salts, & sometimes waste products are stored.

27. What is… a vacuole ?

28. Small structures that store enzymes used to break down food particles, worn out parts of the cell, & invading bacteria & viruses.

29. What are lysosomes?

30. A folded membrane inside the cell that is covered with ribosomes.

31. What is… the rough endoplasmic reticulum?

32. The membrane that surrounds the nucleus.

33. What is… the nuclear envelope?

34. The condensed genetic material that is made of DNA wrapped around proteins.

35. What is… a chromosome?

36. The site inside the nucleus where ribosomes are made.

37. What is… the nucleolus?

38. The hollow tubes of protein that are used to help a cell retain its shape and serve as tracks for organelles to move on inside the cell.

39. What are microtubules?

40. The solid fibers of protein that help a cell move and keep its shape.

41. What are… microfilaments ?

42. The internal structures in a cell that performs a specific functions.

43. What are organelles?

44. A group of similar cells that work together to perform a task.

45. What is… tissue?

46. The groups of tissues that function together to perform a task.

47. What is… an organ ?

48. A type of cell that contains a nucleus.

49. What is… an eukaryotic cell?

50. A type of cell that has a membrane and cytoplasm but does not have a nucleus.