Name: ___________________________________________ Period: ________ Date: _______________________ ID: B
Chapter 3 & 9 Study Guide (Cells, Bacteria, Protists)
Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.
____ 1. Except for bacteria, all cells have a membrane–bound nucleus whose role it is to pass on the hereditary information to new cells. _________________________
____ 2. The cytoplasm stores food, water, minerals, and wastes. _________________________
____ 3. Scientists are able to view cells with a microscope. _________________________
____ 4. Chromosomes contain mitochondria that determine which trait an organism will have. _________________________
____ 5. Animal cells do not have cell walls. _________________________
____ 6. All cells come from cells that already exist. _________________________
____ 7. One difference between plant and animal cells is animal cells do not have chromosomes. _________________________
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 8. The ____ provides support and protection for plant cells.
a. chloroplast
c. cell wall
b. cell membrane
d. vacuole
____ 9. An organelle responsible for making energy in the cell is the ____.
a. DNA
c. mitochondria
b. nucleus
d. cytoplasm
____ 10. The inside of the cell has many ____ for carrying out specific life processes.
a. organelles
c. mitochondria
b. chromosomes
d. tissues
____ 11. The smallest unit of life is the ____.
a. organism
b. protein
c.
d.
homeostasis
cell
____ 12. Asexual reproduction is common in ____.
a. mammals
b. fertilization
c.
d.
bacteria
frogs
7th Grade Science 1
ID: B
____ 13. Chlorophyll can be found in organelles called ____.
a. amino acids
c. chloroplasts
b. ribosomes
d. Golgi bodies
____ 14. What will happen first if a plant cell’s chloroplasts are removed?
a. The cell will not be able to photosynthesize food.
b. The cell will not be able to assemble protein molecules.
c. The cell will not be able to remove waste materials.
d. The cell will not be able to use sugar for energy.
____ 15. What will happen first if a plant cell’s mitochondria are removed?
a. The cell will not be able to use sugar for energy.
b. The cell will not be able to assemble protein molecules.
c. The cell will not be able to photosynthesize food.
d. The cell will not be able to remove waste materials.
Figure 4
____ 16. In Figure 4, which term goes in part B?
a. Flagellum
b. Hereditary materials
c.
d.
Cell membrane
Nucleus
____ 17. In Figure 4, which term goes in part C?
a. Flagellum
b. Nucleus
c.
d.
Hereditary materials
Cell membrane
____ 18. In Figure 4, which term goes in part A?
a. Hereditary materials
b. Nucleus
c.
d.
Cell membrane
Flagellum
7th Grade Science 2
ID: B
Figure 8
____ 19. What important process is shown in Figure 8?
a. respiration
c.
b. development
d.
energy use
homeostasis
____ 20. Plants and some bacteria make their own ____.
a. life spans
c.
b. cells
d.
food
places to live
____ 21. An organelle found only in plants is the ____.
a. vacuole
c.
b. nucleus
d.
mitochondria
chloroplast
____ 22. What is one difference between cilia and flagella?
a. Only cilia are found on the endoplasmic reticulum.
b. A cell may have many cilia, but usually has only one flagellum.
c. A cell may have many flagella, but usually has only one cilium.
d. Cilia are longer than flagella.
Figure 5
____ 23. In Figure 5, which term goes in part B?
a. Organelles
b. Mitochondria
7th Grade Science c.
d.
Nucleus
Bacteria
3
ID: B
____ 24. Which is not found in animal cells?
a. cell wall
b. smooth endoplasmic reticulum
c.
d.
rough endoplasmic reticulum
cytoskeleton
____ 25. The nucleus is the largest of the ____.
a. mitochondria
b. organelles
c.
d.
chloroplasts
ribosomes
Yes/No
Indicate whether you agree with the statement.
____ 26. Mitochondria are the site of photosynthesis.
____ 27. Cell membranes are found in both plant and animal cells.
____ 28. Jim was studying some cells under the microscope. Each cell contained a nucleus, some mitochondria, some chloroplasts, and some Golgi bodies. Were these cells surrounded by cell walls?
Figure 16
____ 29. Is the organism in Figure 16 classified as a eukaryote?
Completion
Complete each statement.
30. The cell’s ____________________ contains chromosomes.
31. Bacteria reproduce by ____________________ reproduction.
32. A(n) ____________________ captures external energy and converts it to energy within the cell.
33. DNA is found in ____________________ cells.
7th Grade Science 4
ID: B
Figure 9
34. Refer to Figure 9. These four things are not shown to the same scale. Sequence them from largest to smallest, according to their real sizes. ____________________
35. All cells are formed from preexisting ____________________.
36. A(n) ____________________ contains the chromosomes or hereditary material of a cell.
37. The cell theory states that: 1) all organisms are composed of ______________ or more cells, 2) cells are the baisc units of ____________, 3) all cells come from _________________ cells.
Figure 10
38. Refer to Figure 10. This cell’s genetic information is in the structure labeled ____________________.
7th Grade Science 5
ID: B
Matching
Match each term with correct statement below.
a. stimuli
d.
b. cells
e.
c. reproduce
f.
energy
homeostasis
life span
____ 39. what all living things use to find food
____ 40. the internal regulation of life‐maintaining processes
____ 41. the smallest units that carry on life functions
____ 42. to make more of an organism’s own kind
____ 43. things that cause change
____ 44. the length of time an organism lives
a.
b.
c.
d.
chromosomes
cell membrane
cell wall
chloroplast
e.
f.
g.
h.
cytoplasm
mitochondria
ribosome
nucleus
____ 45. protects and supports plant cell
____ 46. produces proteins
____ 47. thick gel inside of a cell
____ 48. contains genetic material
____ 49. controls what substances com into and go out of the cell
____ 50. captures energy from the sun to make food
____ 51. the cell’s “powerhouse”, produces energy
____ 52. control center of a cell
Short Answer
53. Rosa is examining some pond water under the microscope. Some of the cells she sees have flagella, and loops of DNA. Should she classify them as prokaryotes or eukaryotes?
7th Grade Science 6
ID: B
54. How are eukaryotic cells different from prokaryotic?
55. What does the cell membrane regulate?
56. Suppose you want to design a new kind of animal. It will live in an environment where there are hardly any plants, so you want the animal to be able to make its own food. In addition to the usual organelles found in animal cells, what other organelles will the animal need? 57. Jamal is examining some pond water under the microscope. Some of the cells he sees contain cell walls and chloroplasts. Should he classify them as prokaryotes or eukaryotes?
58. How does the cell theory explain where cells come from? Explain.
Figure 15
59. Figure 15 shows one cell of a house plant. If the plant does not get enough water, how will this cell change?
7th Grade Science 7
ID: B
60. What advantages does the cell from the multicellular organism have over a single‐celled organism?
61. Describe two functions that are carried out by both single‐celled and multicellular organisms?
62. In what way do cells provide protection and support for a plant?
True/False
Indicate whether the statement is true or false.
____ 63. Some colonies of multicellular organisms have specialized cells.
____ 64. Some scientists think that colonies of single‐celled organisms might have lead to the development of multicellular organisms.
____ 65. Prokaryotic cells have flagellum; eukaryotic cells do not.
____ 66. Organisms, except some primitive plants, are made up of cells.
____ 67. All cells have the same structure but different functions.
____ 68. Most plants and animals are single‐cell organisms.
7th Grade Science 8
ID: B
Chapter 3 & 9 Study Guide (Cells, Bacteria, Protists)
Answer Section
MODIFIED TRUE/FALSE
1. 2. 3. 4. 5. 6. 7. T F, vacuole
T F, DNA
T T F
a cell wall
chloroplasts
MULTIPLE CHOICE
8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. C
C
A
D
C
C
A
A
B
D
D
B
C
D
B
C
A
B
YES/NO
26. 27. 28. 29. N
Y
Y
N
7th Grade Science 1
ID: B
COMPLETION
30. 31. 32. 33. 34. 35. 36. 37. 38. nucleus
asexual
chloroplast
all
D, A, B, C
cells
nucleus
one, life, preexisting
B
MATCHING
39. 40. 41. 42. 43. 44. D
E
B
C
A
F
45. 46. 47. 48. 49. 50. 51. 52. C
G
E
A
B
D
F
H
SHORT ANSWER
53. Prokaryotes
54. Eukaryotic cells make up animals, plants, fungi, and protists. Prokaryotic cells are only found in one‐celled organisms.
55. The cell membrane regulates interactions between the cell and the surrounding environment, allowing nutrients to move in and waste products to move out of the cell.
56. Chloroplasts
57. Eukaryotes
58. The cell theory states that all cells come from preexisting cells. Each new cell comes from another cell and the numbers of living cells increase.
59. The central vacuole will shrink.
7th Grade Science 2
ID: B
60. Possible answer: It doesn’t have to do everything itself. Other cells in the organism can help as needed with life functions. It can stay in one place and not move around.
61. Possible answer: Both single‐celled and multicellular organisms reproduce and adapt to their environments.
62. Some cells in the stem region of the plant are small and thick. When they lie close to each other they form a tough and strong tissue that keeps the plant upright.
TRUE/FALSE
63. 64. 65. 66. 67. 68. T
T
T
F
F
F
7th Grade Science 3