1. CHAPTER 7/8 REVIEW

2. Which of the following is NOT true of plasma membranes. a
Which of the following is NOT true of plasma membranes? a. Folded membranes increase surface area for efficiency. b. Folded membranes do not form compartments in the cell. c. Endoplasmic reticulum is made up of folded membranes. d. Ribosomes are sometimes attached to folded membranes.

3. ANSWER B

4. What do electron microscopes use to focus and magnify an image. a
What do electron microscopes use to focus and magnify an image? a. glass lenses b. X rays c. electron beams d. light

5. ANSWER C

6. One advantage of electron microscopes over light microscopes is their _____. a. size b. higher magnification c. two-dimensional image d. use of live specimens

7. ANSWER B

8. In a chloroplast, the stacks of membranous sacs are called _____. a
In a chloroplast, the stacks of membranous sacs are called _____. a. stroma b. grana c. plastids d. thylakoid membrane

9. ANSWER B

10. Because cells have a watery environment both inside and outside, the polar ends of the phospholipids in the plasma membrane form ____ layers a. several b. mosaic c. double d. single

11. ANSWER C

12. Because the phospholipid molecules and some proteins are free to move, the plasma membrane is said to be a ____. a. bilayer b. solid c. fluid mosaic d. fatty acid

13. ANSWER C

14. A cell's contents would be the same as its surrounds, were it not for ____. a. plasmolysis b. selective permeability c. phagocytosis d. dynamic equilibrium

15. ANSWER B

16. A plasma membrane is made up of a(n) _____. a. cholesterol layer. b
A plasma membrane is made up of a(n) _____. a. cholesterol layer b. enzyme bilayer c. lipid bilayer d. protein layer

17. ANSWER C

18. What is the approximate size of A in Figure 7-3. a. 400 mm. b. 500 mm
What is the approximate size of A in Figure 7-3? a. 400 mm b. 500 mm c. 700 mm d mm

19. ANSWER A

20. What would be the best way to estimate the size of C in Figure 7-3. a
What would be the best way to estimate the size of C in Figure 7-3? a. increase magnification b. decrease magnification c. estimate by what you can see d. assume it is 2000 mm

21. ANSWER B

22. Which of the following pictures in Figure 7-5 most likely approximate the motion phospholipids make in a plasma membrane?

23. ANSWER C

24. Which structure in Figure 7-6 transforms energy? a. C b. G c. J d. K

25. ANSWER C

26. Water moves out of a cell if the cell is placed in a(n) _____ solution
Water moves out of a cell if the cell is placed in a(n) _____ solution. a. hypertonic b. isotonic c. hypotonic d. passive

27. ANSWER A

28. If cells are placed in a strong sugar solution, water will _____. a
If cells are placed in a strong sugar solution, water will _____. a. pass from the sugar solution to the cells b. pass from the cells to the sugar solution c. stay in the cell d. pass back and forth

29. ANSWER B

30. A cell moves particles from a region of lesser concentration to a region of greater concentration by _____. a. facilitated diffusion b. passive transport c. osmosis d. active transport

31. ANSWER D

32. The structure most responsible for maintaining cell homeostasis is the _____. a. cytoplasm b. mitochondrion c. cell wall d. plasma membrane

33. ANSWER D

34. If the sides of a cell double in length, its volume increases by _____ times. a. two b. four c. six d. eight

35. ANSWER D

36. If the sides of a cell double in length, its surface area becomes _____ times as large. a. two b. four c. six d. eight

37. ANSWER B

38. Among the following, the term that includes the others is _____. a
Among the following, the term that includes the others is _____. a. interphase b. nuclear division c. mitosis d. cell cycle

39. ANSWER D

40. By the end of prophase, each of the following has occurred except _____. a. tighter coiling of the chromosomes b. breaking down of the nuclear envelope c. disappearing of the nucleolus d. lining up of chromosomes in the cell

41. ANSWER D

42. Unlike plant cells, animal cells contain _____. a. cell walls. b
Unlike plant cells, animal cells contain _____. a. cell walls b. centrioles c. nucleoli d. spindles

43. ANSWER B

44. Which of the following structures is the most complex. a. cell. b
Which of the following structures is the most complex? a. cell b. organ system c. organ d. tissue

45. ANSWER B

46. The chromosomes shown in Figure 8-6 are in which state of mitosis
The chromosomes shown in Figure 8-6 are in which state of mitosis? prophase b. metaphase c. anaphase d. telophase

47. ANSWER C

48. Which of the cells depicted in the line graph in Figure 8-8 are most likely cancerous? a. A b. B c. C d. D

49. ANSWER A

50. If cancer is present, what is the likely explanation for what happened to cells B and D? a. they thrived with the cancerous cells b. they were harmed by radiation therapy c. they died off on due to natural causes d. they died off because the cancerous cells deprived them of nutrients

51. ANSWER D

52. Cell structures that contain digestive enzymes are ____________________.

53. Lysosomes

54. The functions of a eukaryotic cell are managed by the ____________________.

55. ANSWER
Nucleus

56. The structures that hold together sister chromatids are ____________________.

57. ANSWER
Centromeres

58. The dark-staining structures that carry the genetic material are the ____________________.

59. ANSWER
Chromosomes

60. The uncontrolled division of cells that results in a malignant growth is known as ____________________.

61. ANSWER
Cancer

62. Movement of particles from an area of higher concentration to one of lower concentration

63. ANSWER
Diffusion

64. The concentration of dissolved substances outside the cell is higher than the concentration inside the cell

65. ANSWER
Hypertonic Solution

66. The concentration of dissolved substances in the solution is the same as the concentration of dissolved substances inside the cell

67. ANSWER
Isotonic Solution

68. A segment of DNA that controls the production of a protein

69. ANSWER
Gene

70. Release of wastes or cell products from inside to outside a cell

71. ANSWER
Exocytosis