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Name
8
Class
Photosynthesis
Date
Chapter Test A
Multiple Choice
Write the letter that best answers the question or completes the statement on the line provided.
_____ 1. Which of the following is NOT a true statement about ATP?
a. ATP consists of ribose, adenine, and three phosphate groups.
b. ADP is produced when ATP releases energy.
c. ATP provides energy for the mechanical functions of cells.
d. Used ATP is discarded by the cell as waste.
_____ 2. Look at Figure 8–1. All of the following are
parts of an ADP molecule EXCEPT
a. structure A.
b. structure B.
c. structure C.
d. structure D.
_____ 3. What happens during photosynthesis?
a. Heterotrophs consume ATP.
b. Heterotrophs produce ATP.
c. Autotrophs consume carbohydrates.
d. Autotrophs produce carbohydrates.
Figure 8–1
_____ 4. Plants gather the sun’s energy using molecules called
a. pigments.
b. thylakoids.
c. chloroplasts.
d. glucose.
_____ 5. Which structure in Figure 8–2 represents a
single thylakoid?
a. structure A
b. structure B
c. structure C
d. structure D
_____ 6. Where in the chloroplast is chlorophyll
found?
a. in the ATP
b. in the stroma
c. in the thylakoid membrane
d. in the thylakoid space
Figure 8–2
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Figure 8–3
_____ 7. Which chemical shown in Figure 8–3 is an electron carrier molecule?
a. H2O
c. NADP+
b. carbon dioxide
d. oxygen
_____ 8. Why are electron carriers needed for transporting electrons from one part of the chloroplast
to another?
a. High-energy electrons would be destroyed.
b. High-energy electrons are highly reactive.
c. High-energy electrons are not soluble in cytoplasm.
d. High-energy electrons get their energy from electron carriers.
_____ 9. Photosynthesis uses sunlight to convert water and carbon dioxide into
a. oxygen and carbon.
b. high-energy sugars and proteins.
c. ATP and oxygen.
d. oxygen and high-energy sugars.
Figure 8–4
_____ 10. In Figure 8–4, why might the candle in jar A burn longer than the candle in jar B?
a. Carbon dioxide produced by the plant allows the candle to burn longer.
b. Chlorophyll produced by the plant allows the candle to burn longer.
c. Glucose produced by the plant allows the candle to burn longer.
d. Oxygen produced by the plant allows the candle to burn longer.
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_____ 11. Which of the following is NOT a step in the light-dependent reactions?
a. High-energy electrons move through the electron transport chain.
b. Pigments in photosystem II absorb light.
c. ATP synthase allows H+ ions to pass through the thylakoid membrane.
d. ATP and NADPH are used to produce high-energy sugars.
_____ 12. Where are photosystems I and II found?
a. in the stroma
c. in the Calvin cycle
b. in the thylakoid membrane
d. in the cell membrane
_____ 13. Which pathway represents the flow of electrons during photosynthesis?
a. H2O → Photosystem I → Photosystem II
b. O2 → ADP → Calvin cycle
c. Photosystem I → Calvin cycle → NADP+
d. H2O → NADP+ → Calvin cycle
_____ 14. The Calvin cycle takes place in the
a. stroma.
b. photosystems.
c. thylakoid membranes.
d. chlorophyll molecules.
_____ 15. If you continue to increase the intensity of light that a plant receives, what happens?
a. The rate of photosynthesis increases indefinitely with light intensity.
b. The rate of photosynthesis decreases indefinitely with light intensity.
c. The rate of photosynthesis increases and then levels off .
d. The rate of photosynthesis does not change.
Completion
Complete each statement on the line provided.
16. Thylakoids are arranged in stacks known as
.
17. The area in Figure 8–5 labeled A is called the
.
18. A membrane protein called
allows
+
H ions to pass through the thylakoid membrane and into
the stroma.
19. During the Calvin cycle, molecules of
supply the carbon component of carbohydrates.
20. In many plants, the rate of photosynthesis
the weather becomes very cold.
when
Figure 8–5
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Short Answer
In complete sentences, write the answers to the questions on the lines provided.
Figure 8–6
21. Examine the food web in Figure 8–6 and identify whether each organism is an autotroph or a
heterotroph.
22. Why are six carbon dioxide molecules required to make one glucose molecule?
23. In what ways are photosystems I and II similar?
24. Why is it important that a membrane separate the cellular regions on either side of an ATP
synthase molecule in order for the protein to perform its function?
25. Describe the relationship between the light-dependent and the light-independent reactions.
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Using Science Skills
Use the diagram below to answer the following questions on the lines provided.
A student put together two different experimental setups as shown below.
Figure 8–7
26. Design an Experiment Look at Figure 8–7. What factor is the student varying? What might the
student be trying to test?
27. Control Variables Suggest an appropriate control for the experiment shown in Figure 8–7.
28. Predict In Figure 8–7, assume that the student placed Plant A in indirect sunlight for two days.
How would the rate of photosynthesis of this plant compare with that of a plant grown under
normal conditions?
29. Predict In Figure 8–7, assume that the student placed Plant B in indirect sunlight for two days.
How would the rate of photosynthesis of this plant compare with that of a plant grown under
normal conditions?
30. Predict Review the setups in Figure 8–7. Make a prediction about the effect of carbon dioxide on
starch production in plants.
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Essay
Write the answer to each question in the space provided.
31. Compare the storage capacity of ATP and glucose. How does the cell use each of these molecules
to store energy?
32. Describe the kinds of light that chlorophyll and carotene pigments absorb. What is the advantage
for a plant to have more than one kind of pigment?
33. Some people informally call the light-dependent reactions the “light reactions” and the lightindependent reactions the “dark reactions.” Why is this naming system misleading?
34. Identify three factors that affect the rate of photosynthesis and explain the effect of each.
35. Describe how photosynthesis in CAM plants differs from photosynthesis in more typical plants.
Why is it unlikely that you would find a CAM plant in an aquatic environment?
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