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Bio. Ch 8 '05 Photosynthesis

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 
Organisms, such as plants, that make their own food are called
a.
autotrophs.
c.
thylakoids.
b.
heterotrophs.
d.
pigments.
 

 2. 
Organisms that cannot make their own food and must obtain energy from the foods they eat are called
a.
autotrophs.
c.
thylakoids.
b.
heterotrophs.
d.
plants.
 

 3. 
Which of the following is an autotroph?
a.
mushroom
c.
leopard
b.
impala
d.
tree
 

 4. 
Which of the following is NOT an example of a heterotroph?
a.
mushroom
c.
grass
b.
leopard
d.
human
 

 5. 
What are the three parts of an ATP molecule?
a.
adenine, thylakoids, stroma
c.
adenine, ribose, phosphate groups
b.
stroma, grana, chlorophyll
d.
NADH, NADPH, and FADH2
 

 6. 
Which of the following is NOT a part of an ATP molecule?
a.
adenine
c.
chlorophyll
b.
ribose
d.
phosphate
 

 7. 
Energy is released from ATP when
a.
a phosphate group is added.
c.
ATP is exposed to sunlight.
b.
adenine bonds to ribose.
d.
a phosphate group is removed.
 

 8. 
Which of the following is NOT a true statement about ATP?
a.
ATP consists of ribose, adenine, and phosphate.
b.
ADP forms when ATP releases energy.
c.
ATP provides energy for the mechanical functions of cells.
d.
Used ATP is discarded by the cell as waste.
 
 
bio-_ch_8_-05_photosynthe_files/i0100000.jpg

Figure 8–1
 

 9. 
Look at Figure 8–1. All of the following are parts of an ADP molecule EXCEPT
a.
structure A.
c.
structure C.
b.
structure B.
d.
structure D.
 

 10. 
Which structures shown in Figure 8–1 make up an ATP molecule?
a.
A and B
c.
A, B, C, and D
b.
A, B, and C
d.
C and D
 

 11. 
In Figure 8–1, between which parts of the molecule must the bonds be broken to form an ADP molecule?
a.
A and B
c.
C and D
b.
B and C
d.
all of the above
 

 12. 
Jan van Helmont concluded that plants gain most of their mass from
a.
water.
c.
carbon dioxide in the air.
b.
the soil.
d.
oxygen in the air.
 

 13. 
Which scientists showed that plants need light to grow?
a.
van Helmont and Calvin
c.
van Helmont and Priestley
b.
Priestley and Ingenhousz
d.
Priestley and Calvin
 

 14. 
Ingenhousz showed that plants produce oxygen bubbles when exposed to
a.
ATP.
c.
light.
b.
carbon dioxide.
d.
a burning candle.
 

 15. 
Suppose Priestley repeated his experiment using many kinds of plants besides mint, and that when different plants were placed under the jar the candle remained lighted for different periods of time. What would be a logical conclusion from these experiments?
a.
Different plants require different amounts of water.
b.
Different plants release different amounts of carbon dioxide.
c.
Different plants require different amounts of light.
d.
Different plants release different amounts of oxygen.
 

 16. 
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.
c.
ATP.
b.
carbon dioxide.
d.
vaporized water.
 

 17. 
Photosynthesis uses sunlight to convert water and carbon dioxide into
a.
oxygen.
b.
high-energy sugars and starches.
c.
ATP and oxygen.
d.
oxygen and high-energy sugars and starches.
 

 18. 
Which of the following is(are) used in the overall reactions for photosynthesis?
a.
carbon dioxide
c.
light
b.
water
d.
all of the above
 

 19. 
In the overall equation for photosynthesis, six molecules of carbon dioxide result in six molecules of
a.
glucose.
c.
oxygen.
b.
water.
d.
ATP.
 

 20. 
Plants gather the sun’s energy with light-absorbing molecules called
a.
pigments.
c.
chloroplasts.
b.
thylakoids.
d.
glucose.
 

 21. 
Plants take in the sun’s energy by absorbing
a.
high-energy sugars.
c.
chlorophyll b.
b.
chlorophyll a.
d.
sunlight.
 

 22. 
Most plants appear green because chlorophyll
a.
does not absorb green light.
c.
absorbs green light.
b.
reflects violet light.
d.
none of the above
 

 23. 
Which region of the visible spectrum is not absorbed well by chlorophyll?
a.
blue
c.
green
b.
violet
d.
red
 

 24. 
A granum is a
a.
stack of chloroplasts.
c.
membrane enclosing a thylakoid.
b.
stack of thylakoids.
d.
photosynthetic pigment molecule.
 

 25. 
The stroma is the region outside the
a.
thylakoids.
c.
plant cells.
b.
chloroplasts.
d.
all of the above
 

 26. 
Where in the chloroplast is chlorophyll found?
a.
in the stroma
c.
in the ATP
b.
in the thylakoid
d.
in the glucose
 

 27. 
Which of the following is false?
a.
A chloroplast contains stroma.
c.
A granum contains several thylakoids.
b.
A stroma contains a thylakoid.
d.
A thylakoid contains chlorophyll.
 

 28. 
Where do the light-dependent reactions take place?
a.
in the stroma
c.
within the thylakoid membranes
b.
in the mitochondria
d.
only in chlorophyll molecules
 

 29. 
What are the products of the light-dependent reactions?
a.
oxygen gas
c.
NADPH
b.
ATP
d.
all of the above
 

 30. 
Which step is the beginning of photosynthesis?
a.
Pigments in photosystem I absorb light.
b.
Pigments in photosystem II absorb light.
c.
High-energy electrons move through the electron transport chain.
d.
ATP synthase allows H+ ions to pass through the thylakoid membrane.
 

 31. 
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.
 

 32. 
Which of the following is inside the thylakoid membrane?
a.
electron transport chain
c.
ATP synthase
b.
photosystem I
d.
all of the above
 

 33. 
Why does the inside of the thylakoid membrane become positively charged during the light-dependent reactions?
a.
H+ ions are released as water splits.
b.
ATP synthase allows H+ ions to pass through the membrane.
c.
ATP synthase produces ATP from ADP.
d.
Carbon dioxide builds up in the stroma.
 

 34. 
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 → NADPH
d.
H2O → NADPH → Calvin cycle
 

 35. 
Where are photosystems I and II found?
a.
in the stroma
c.
in the Calvin cycle
b.
in the thylakoid membrane
d.
all of the above
 

 36. 
The Calvin cycle is another name for
a.
light-independent reactions.
c.
photosynthesis.
b.
light-dependent reactions.
d.
all of the above
 

 37. 
The Calvin cycle takes place in the
a.
stroma.
c.
thylakoid membranes.
b.
photosystems.
d.
chlorophyll molecules.
 

 38. 
What is a product of the Calvin cycle?
a.
oxygen gas
c.
high-energy sugars
b.
ATP
d.
carbon dioxide gas
 

 39. 
How does the Calvin cycle differ from the light-dependent reactions?
a.
It takes place in the stroma.
c.
It requires light.
b.
It takes place in chloroplasts.
d.
It takes place in the thylakoid.
 

 40. 
If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars?
a.
More sugars will be produced.
b.
No 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 high-energy sugars in plants.
 

 41. 
Which of the following affects the rate of photosynthesis?
a.
water
c.
light intensity
b.
temperature
d.
all of the above
 

 42. 
If you continue to increase the intensity of light that a plant receives, what happens?
a.
The rate of photosynthesis increases with light intensity.
b.
The rate of photosynthesis decreases with light intensity.
c.
The rate of photosynthesis increases and then levels off.
d.
The rate of photosynthesis does not change.
 

 43. 
What would you expect to happen to plants at temperatures greater than 45°C?
a.
They will have a very high rate of photosynthesis.
b.
They will have a less than optimal rate of photosynthesis.
c.
They will have a high rate of photosynthesis if light intensity is also great.
d.
They will have an optimal rate of photosynthesis if water is available.
 
 
bio-_ch_8_-05_photosynthe_files/i0460000.jpg

Figure 8–2
 

 44. 
Which of the graphs in Figure 8–2 represents the effect of temperature on the rate of photosynthesis?
a.
A
c.
C
b.
B
d.
D
 

 45. 
Which of the graphs in Figure 8–2 represents the effect of light intensity on the rate of photosynthesis?
a.
A
c.
C
b.
B
d.
D
 

True/False
Indicate whether the sentence or statement is true or false.
 
 
USING SCIENCE SKILLS
A student prepared two beakers with identical sprigs of a water plant as shown below. She placed one beaker in the shade and the other beaker beside a fluorescent lamp. She then systematically changed the distance from the beaker to the lamp. She counted the bubbles given off by each sprig of the water plant. Shown here is the graph of the data for the beaker she placed in the light.

bio-_ch_8_-05_photosynthe_files/i0500000.jpg
 
bio-_ch_8_-05_photosynthe_files/i0500001.jpg


Figure 8–4
 

 46. 
The beaker in the shade was the control in the experiment
 

 47. 
The bubbles collected in the test tube were most likely carbon dioxide.
 

 48. 
The graph indicates that the greatest rate of photosynthesis was recorded at 25 degrees Celsius.
 

 49. 
If the water was cooled to 100 degrees Celsius, the plant would increase it’s rate of photosynthesis.
 

 50. 
To increase the rate of bubble making, the student should use green light.
 

Matching
 
 
a.
H2O
e.
ADP
b.
CO2
f.
ATP
c.
C6H12O6
g.
6
d.
O2
h.
8
 

 51. 
Which number goes in front of the two reactants in the photosynthesis equation?
 

 52. 
An energy molecule produced during the Calvin cycle
 

 53. 
The source of H+ ions in the light dependent reachtions.
 

 54. 
Produced as a by product of photosynthesis
 

 55. 
The energized molecule that is created by the light reactions
 



 
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