Download Chapter 7 Test A

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Unit 4 (Cell Structure and Transport) CFA
Period:
Date:
1. Which scientist first used the term cell?
a. Hooke
b. Janssen
c. Pasteur
d. Leeuwenhoek
2. What did scientists observe using the earliest microscopes?
a. atoms
b. cell parts
c. molecules
d. tiny organisms
3. A scanning electron microscope is best used to view which of the following?
a. living amoeba
b. interior cell parts
c. outer surface of pollen d. electrons
4. Which statement is a fundamental principle of the cell theory?
a. All cells have a plasma membrane.
c. Living organisms are composed of cells.
b. Eukaryotic cells are larger than prokaryotic cells.
d. The genetic material in cells is DNA.
5. Which statement is true about bacterial cells?
a. The cells are very large.
c. They are eukaryotes.
b. The cells have no nucleus.
d. They have organelles.
6. Which is present only in eukaryotic cells?
a. cell membrane
b. ribosomes
c. DNA
d. nucleus
7. How is the smooth endoplasmic reticulum different from the rough endoplasmic reticulum?
a. smooth ER is only in prokaryotes
c. smooth ER has attached ribosomes
b. smooth ER is only in animal cells
d. smooth ER does NOT have attached ribosomes
8. The process of the plasma membrane pumping sodium out of a cell into an environment
where there is already a higher concentration of sodium is an example of ____.
a. diffusion
b. osmosis
c. active transport
d. facilitated diffusion
Figure 7-4
9. What would happen to the structure in Figure 7-4 if part D is completely removed?
a. It would become more rigid.
c. It would have holes in it.
b. It would disintegrate.
d. It would collapse in on itself.
10. Where are you least likely to find water in the structure shown in Figure 7-4?
a. A
b. B
c. C
d. D
e. E
11. Which substance on the plasma membrane helps identify chemical signals from outside the
cell?
a. carbohydrate chain
c. membrane lipids
b. cholesterol
d. transport molecules
12. Cholesterol is repelled by water and can be found between the layers of the phospholipids in
the plasma membrane. What can be concluded from this information?
a. A high cholesterol diet should be avoided.
c. Cholesterol is polar.
b. Cholesterol is nonpolar.
d. Cholesterol is repelled by the polar tails.
13. A plant cell is placed in a hypotonic solution. What will happen to the plant cell?
a. It will swell.
b. It will shrink.
c. It will stay the same.
d. It will wilt.
14. Which of the following describes a part of the endosymbiotic theory?
a. Eukaryotes were the first types of cells to exist.
b. Chloroplasts arose when photosynthetic prokaryotes were engulfed by a larger cell but were
not digested.
c. Cells cannot exist without a nucleus to contain their DNA.
d. All cells have a cell membrane, cytoplasm, ribosomes, and DNA.
15. Chloroplasts are organelles that convert light energy to sugars. These organelles are found only
in plants. Which organelles are found only in animals?
a. Golgi apparatus
b. lysosomes
c. mitochondria
d. ribosomes
16. At what point in the process of diffusion is dynamic equilibrium reached?
a. when the movement of the molecules stops being random
b. when the molecules are mixed and stop moving
c. when the rate of change in the solution slows by one half
d. when there is continuous movement but no change
17. What is a major difference between facilitated diffusion and active transport?
a. Active transport moves substances against the concentration gradient.
b. Active transport uses proteins in the process.
c. Facilitated diffusion moves molecules through the plasma membrane.
d. Facilitated diffusion requires large amounts of energy.
18. Which of the following is an example of passive transport?
a. endocytosis
b. exocytosis
c. facilitated diffusion
d. Na+/K+ pump
19. What types of materials are expelled from cells during exocytosis?
a. large molecules such as hormones
c. small molecules such as carbon dioxide
b. positive and negative ions
d. water and glycerol
20. Algal cells are placed in an isotonic solution. Additional amounts of solutes are slowly added to
the solution. What happens to the cells?
a. They will begin to swell.
c. They will stay the same.
b. They will burst.
d. They will shrink.
21. Which is a protein fiber that forms the cell’s supporting network?
a. cell wall
b. cell membrane
c. endoplasmic reticulum
d. cytoskeleton
22. Which of the following is a correct definition of a cell?
a. microscopic organisms in water
c. the basic unit of living things
b. protein molecules on animals
d. the smallest type of animal
23. Which is a structure common to ALL cells?
a. mitochondria
b. nucleus
c. endoplasmic reticulum
d. plasma membrane
24. A scientist at the polar ice cap was studying an ice sample from hundreds of meters below the
surface. While examining the ice, the scientist found some cells from many years ago. Using an
electron microscope, the scientist identified these cell structures: a cytoskeleton, mitochondrion,
nucleus, cell wall, and ribosomes. What kind of organism did the scientist find?
a. animal
c. plant
b. bacteria
d. It could have been any of these cell types.
Identify the structures in the cell shown above by matching the name of the structure to correct letter.
25. plasma membrane
26. mitochondria
27. centrioles
28. Golgi apparatus
29. endoplasmic reticulum
Matching
30. a unicellular organism such as bacteria
31. cells have a nucleus
a. eukaryote
32. cells have membrane-bound organelles that carry out specific tasks
b. prokaryote
33. the first type of cell to evolve
Each of the diagrams below represents a cell that has been placed in a solution. Match each
diagram with the correct solution type.
A.
34. Hypertonic
35. Hypotonic
36. Isotonic
37. Which cell might burst?
B.
C.
Matching
38. where a cell’s energy is converted to ATP
a. cell wall
39. where proteins are synthesized
b. Golgi apparatus
40. breaks down unwanted substances in the cell
c. lysosome
41. contains the cell’s DNA
d. mitochondria
42. stores nutrients and water
e. nucleus
43. packages cell proteins for export from the cell
f. ribosome
44. found outside the cell membrane in some cells
g. vacuole
b.
a.
c.
d.
e.
45. What type of cell is represented by the diagram above?
a. a prokaryotic, animal cell
c. a prokaryotic plant cell
b. a eukaryotic animal cell
d. a eukaryotic plant cell
46. used to store water
47. controls cells activities
48. site of photosynthesis
49. transports proteins within the cell
50. gives support and protection to cell
Unit 4 CFA
Answer Section
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ANS: A
ANS: D
ANS: C
ANS: C
ANS: B
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ANS: D
ANS: C
ANS: A
ANS: E
ANS: A
ANS: B
ANS: A
ANS: B
ANS: B
ANS: D
ANS: A
ANS: C
ANS: A
ANS: D
ANS: D
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ANS: D
ANS: C
ANS: F
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ANS: A
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ANS: A
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ANS: C
ANS: B
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ANS: F
ANS: C
ANS: E
ANS: G
ANS: B
ANS: A
ANS: D
ANS: C
ANS: E
ANS: B
ANS: D
ANS: A