Download Chapter 8 Photosynthesis

Chapter 8 Photosynthesis
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
1. Photosynthesis uses sunlight to convert water and carbon dioxide into
a. oxygen only.
b. sugars only.
c. ATP and oxygen.
d. oxygen and sugars.
2. Which of the following is part of the overall reaction for photosynthesis?
a. carbon dioxide
b. water
c. light
d. all of the above
3. In the overall equation for photosynthesis, six molecules of carbon dioxide result in six molecules of
a. glucose.
b. water.
c. oxygen.
d. ATP.
4. The stroma is the thick fluid within the inner membrane of a chloroplast that surrounds
a. thylakoids.
b. chloroplasts.
c. plant cells.
d. all of the above
5. Most plants appear green because chlorophyll
a. does not absorb green light.
b. reflects violet light.
c. absorbs green light.
d. none of the above
6. Where in the chloroplast is chlorophyll found?
a. in the stroma
b. in the thylakoid
c. in the ATP
d. in the glucose
7. A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. The gas being
collected is probably
a. oxygen.
b. carbon dioxide.
c. ATP.
d. vaporized water.
8. What are the products of the light reactions?
a. oxygen
b. ATP
c. NADPH
d. all of the above
9. Plants gather the sun’s energy with light-absorbing molecules called
a. pigments.
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b. thylakoids.
c. chloroplasts.
d. glucose.
Which of the following is NOT a step in the light reactions?
a. Electrons move through the electron transport chain.
b. Pigments in the first photosystem absorb light.
c. ATP synthase allows H+ ions to pass through the thylakoid membrane.
d. ATP and NADPH are used to produce sugars.
A thylakoid is a
a. regoin inside a chloroplast.
b. a sac-like structure containing chlorophyll.
c. a stack of grana.
d. source of carbon dioxide.
Which of the following is false?
a. A chloroplast contains stroma.
b. A thylakoid contains a granum.
c. A granum contains several thylakoids.
d. A thylakoid contains chlorophyll.
Where do the light reactions take place?
a. in the stroma
b. outside the chloroplasts
c. in the thylakoid membranes
d. only in chlorophyll molecules
If carbon dioxide is removed from a plant’s environment, what would you expect to happen to the plant’s
production of sugars?
a. More sugars will be produced.
b. Fewer sugars will be produced.
c. The same number of sugars will be produced but without carbon dioxide.
d. Carbon dioxide does not affect the production of sugars in plants.
Which region of the visible spectrum is not absorbed well by chlorophyll?
a. blue
b. violet
c. green
d. red
Plants take in energy by absorbing
a. sugars.
b. chlorophyll a.
c. chlorophyll b.
d. sunlight.
Which step is the beginning of photosynthesis?
a. Pigments in the first photosystem absorb light.
b. A water molecule is split, releasing oxygen.
c. Electrons move through the electron transport chain.
d. ATP synthase allows H+ ions to pass through the thylakoid membrane.
Where are photosystems found?
a. in the stroma
b. in the thylakoid membrane
c. in the Calvin cycle
d. all of the above
19. What is a product of the Calvin cycle?
a. oxygen gas
b. ATP
c. sugar
d. carbon dioxide gas
20. In the chloroplast, the Calvin cycle takes place
a. in the matrix.
c. in the thylakoid.
b. in the stroma.
d. in the inner membrane space.
Completion
Complete each sentence or statement.
Word Bank
Sugars
Photosystems
Water
ATP synthase
Chlorophyll
21. Photosynthesis uses the energy of sunlight to convert water and carbon dioxide into oxygen and
_________________________.
22. Chemical compounds that give chloroplasts a green color are called _________________________.
23. A _________________________ is a cluster of chlorophyll and other molecules within the thylakoid membrane.
24. The excited electrons that chlorophyll transfers to the electron transport chain are replenished by electrons from
_________________________ molecules.
25. A membrane protein called _________________________ allows H+ ions to pass through the thylakoid
membrane.
Other
USING SCIENCE SKILLS
Figure 8-2
26. Observing What process is shown in Figure 8-2?
27. Observing Look at Figure 8-2. What are two products of the light reactions?
[2 points; 1 point each]
28. Observing According to Figure 8-2, what compound is converted into sugar?
29. Inferring What structure is shown in Figure 8-2?
USING SCIENCE SKILLS
A student put together two different experimental setups as shown below.
Figure 8-3
30. Predicting In Figure 8-3, assume that the student tested the oxygen content in Jar B, then placed it in indirect
sunlight for two days. After this time, the student tested the air in the bell jar again for oxygen content. What would
you expect the results to be? [5 points]
31. Predicting In Figure 8-3, assume that the student placed Plant A in indirect sunlight for two days. After this time,
the student tested one leaf from the plant for starch content. (Plants make starch from sugars.) What would you
expect the results to be? How would the starch content of this plant compare with the starch content in the leaves
of a plant grown under normal conditions? [5 points]
Chapter 8 Photosynthesis
Answer Section
MULTIPLE CHOICE
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D
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C
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B
COMPLETION
21.
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25.
sugars
chlorophylls
photosystem
water
ATP synthase
OTHER
26.
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29.
30.
photosynthesis
Oxygen gas, ATP, and NADPH are the products of the light reactions.
carbon dioxide
Chloroplast
The plant receives extra carbon dioxide in the sun, so you would expect it to carry out photosynthesis more rapidly
and thus for there to be more oxygen.
31. Plant A is being grown with a carbon dioxide-absorbent material. A plant grown in an environment with depleted
carbon dioxide will have little to no starch in its leaves because it will not be able to carry out the Calvin cycle
without carbon dioxide. A plant grown under normal conditions would have starch in its leaves.