1. Cells Unit Test Review

2. C

3. A

4. E

5. A

6. B

7. E

8. D

9. E

10. B

11. A

12. D

13. A

14. C

15. A

16. D

17. D

18. 17. If a person is suffering from severe dehydration and does not have enough water in his or her cells, a physician might give the person an intravenous (IV) solution to rehydrate the cells. This solution is most likely: A. Isotonic to the cells B. Hypotonic to the cells C. Hypertonic to the cells D. Non-tonic to the cells B

19. C

20. A

21. C

22. 7. Scientists have found that the rate of division in amoebas is controlled. Scientists believe that the transition from stage 2 to stage 3 is slowed by proteins. The additional time seems to help the amoeba change coding errors caused during DNA replication. Specialized proteins control cell division in the amoeba. Which cell part is responsible for making these proteins? A. mitochondrion B. pseudopod C. ribosome D. lysosome C

23. 34. The following cell structures are located within cells that make proteins. Which description best explains the relationship among these cell structures in making a protein? nucleus ribosome endoplasmic reticulum (ER) A. nucleus makes protein protein winds through the ER protein folds into its active shape B. nucleus directs ER to assemble the protein ribosomes surround protein protein folds into its active shape C. ER creates protein DNA in the nucleus codes for ribosomes to surround protein protein folds into its active shape D. DNA in nucleus codes for protein protein assembled in ribosomes and moves to ER protein folds into its active shape D

24. A

25. C

26. 33. What will happen if an animal cell that has a solute concentration of 1% is placed in a 5% saltwater solution? A. It will shrink because there is less water outside of the cell than there is on the inside. B. It will burst because there is more water on the outside of the cell than there is on the inside. C. It will burst because there is more water on the inside of the cell than there is on the outside. D. It will remain the same size because there is an equal amount of water on the inside and outside of the cell. A

27. 5. Each type of specialized cell in the body performs a special function to maintain homeostasis. These cells have different structures which reflect the different functions they perform, however all of these cells began from a few simple cells that make up an embryo. What major factor causes the structural changes in the different cells of the body known as differentiation? A. Different sections of DNA are activated or not activated to make different structures B. The mother provides chemical signals to the embryo as it develops in the womb C. Different cells receive different levels of oxygen during differentiation creating different types of cells D. Growth hormone changes the structure of the embryo’s cells as it develops A

28. 3. Some students were viewing some specialized animal cells under the microscope. Which of the cells they viewed will have the most mitochondria? A. muscle and blood cells B. connective and nerve cells C. muscle and nerve cells D. blood and nerve cells C

29. D

30. 6. Which structure in the single celled algae captures energy? A. nucleus B. ribosome C. chloroplast D. cell membrane C

31. A

32. 8. The cell above is most likely to be classified as eukaryotic because A. it is exhibiting endocytosis B. it contains multiple membrane bound organelles C. it lacks chloroplasts D. its genetic material is not contained within a nucleus B

33. 19. A sodium-potassium pump within a cell membrane requires energy to move sodium and potassium ions into or out of a cell. The movement of glucose into or out of a cell does not require energy. Which statement best describes the movement of these materials across a cell membrane? A. Sodium and potassium ions move by active transport, and glucose moves by osmosis. B. Sodium and potassium ions move by active transport, and glucose moves by facilitated diffusion. C. Sodium and potassium ions move by facilitated diffusion, and glucose moves by osmosis. D. Sodium and potassium ions move by facilitated diffusion, and glucose moves by active transport. B

34. 9. The organism shown is multi-cellular and complex. Which statement about this organism’s cells is most valid? A. The organism’s cells are prokaryotic B. The organism’s cells have a nucleus C. The organism’s cells do not have a nucleus D. The organism’s cells are bacterial B

35. 10. Some students have collected some data on some cells and want to use this data to classify the cells they observed. Which statement is true based on the data they collected? A. All of the cells are eukaryotes B. All of the cells are plant cells C. All of the cells are prokaryotes D. All of the cells are animal cells A

36. 16. Tissues and organs are two of the levels of biological organization. Skin and blood are: A. Both tissues B. Both organs C. A tissue and organ, respectively D. An organ and tissue, respectively D

37. 1. The cell structure shown above helps a cell maintain homeostasis by A. performing energy conversions B. transporting molecules into and out of the cell C. synthesizing new molecules D. storage of proteins B

38. 4. What of these cells is most likely involved in transportation of nutrients, waste or oxygen to maintain homeostasis in the body? A. blood cell B. muscle cell C. nerve cell D. connective cell A

39. B

40. B

41. D

42. 20. The rough endoplasmic reticulum and Golgi apparatus work together in eukaryotic cells. What is one way that the rough endoplasmic reticulum assists the Golgi apparatus? A. It assembles nucleic acids from monomers. B. It breaks down old, damaged macromolecules. C. It packages new protein molecules into vesicles. D. It determines which protein molecules to synthesize. C

43. A

44. 22. The endoplasmic reticulum is a network of membranes within the cell, and it is often classified as rough or smooth, depending on whether there are ribosomes on its surface. Which statement best describes the role of rough endoplasmic reticulum in the cell? A. It stores all proteins for later use. B. It provides an attachment site for larger organelles. C. It aids in the production of membrane and secretory proteins. D. It stores amino acids required for the production of all proteins. D

45. 23. Which structure is primarily responsible for directing all processes of a plant cell? A. chloroplast B. lysosome C. mitochondria D. nucleus D

46. A

47. B

48. 28. A biologist studied a cell with an electron microscope. The cell contained an endoplasmic reticulum, chloroplasts, and a cell wall. The biologist observed a cell from which of the following groups? A Plant B Animal C Fungus D Bacteria A

49. B

50. 35. Modifies, sorts, and packages proteins A. Ribosomes B. Golgi Apparatus C. Mitochondria D. Vacuoles B

51. 36. Provides energy for the cell A. Ribosomes B. Golgi Apparatus C. Mitochondria D. Vacuoles C

52. 37. The levels of organization (from simple to large) A. organs, cells, organ systems, and tissues B. organs, organ systems, tissues, and cells C. cells, organs, organ systems, and tissues D. cells, tissues, organs, and organ systems D

53. 2. The graph shows the effects if light intensity on the process of photosynthesis in some specialized plant cells. These specialized cells are most likely A. leaf cells containing a large number of chloroplasts B. root cells containing a large number of chloroplasts C. stem cells containing a large number of nuclei D. plant reproductive cells containing a large number of chloroplasts A