Topic 3
Cell structure and function
Review and reinforce
1. Identify each of the cell structures in the figure
1)
2)
3)
4)
5)
2. Complete the table by writing the names or functions of
cell parts.
1)
Cell part
Functions
A.
B.
C.
D.
Collect sunlight energy to make food
E. Ribosome
F.
2) Which cell is it, an animal or a plant cell? Why?
3. Building vocabulary
1
Topic 3
Cell structure and function
Down
Across
1. Provides the instructions （指 3. The part of the cell that makes proteins
令）for the cell
2. The battery （电池）of the cell
（蛋白质）
4.Collect light energy to use in photosynthesis
7. Provides strength and support to （光合作用）
plant cells
8. Controls what enters and leaves the cell
8. A jelly-like substance where many
9. A storage space filled with sap that is only
of the cell’s reactions occur
found in plant cells
10. Smallest unit of a living thing
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Topic 3
Cell structure and function
4. 1) What parts do plant cells have that animal cells do not?
2) What is the name given to all the parts that float in the cytoplasm?
3) Describe （描述）why it is necessary for plants to have chloroplasts.
4) Why does a plant have both a rigid cell wall and a cellular membrane?
Extension Questions
Read This!
All cells undergo cellular respiration for the production of energy. Energy is necessary for all
metabolic activity within the cell.
The formula for cellular respiration is
Plants carry out photosynthesis for the production of glucose. The glucose then becomes the
energy source for cellular respiration.
The formula for photosynthesis is Sun’s energy
1.
Study the information given in the Read This! box.
a. In what organelle does cellular respiration occur?
b. Do plant and animal cells both have this structure?
3
Topic 3
Cell structure and function
2. In what organelle does photosynthesis occur? Do plant and animal cells both have this
structure?
3. Using the equations above, explain the relationship between mitochondria and chloroplasts.
4. Plants have both mitochondria and chloroplasts; they can produce their own glucose to fuel
cellular respiration. Animal cells, on the other hand, have only mitochondria. If an animal eats
only meat what would be its source of glucose?
5. Where in the human body would you find cells with a large number of mitochondria? Why?
4