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Photosynthesis On Line Test

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

 1. 

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

 2. 

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

 3. 

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

 4. 

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.
 
 
nar001-1.jpg

Figure 8–1
 

 5. 

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.
 

 6. 

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

 7. 

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

 8. 

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

 9. 

Organisms that cannot make their own food and must obtain energy from external sources are called
a.
autotrophs.
b.
heterotrophs.
c.
thylakoids.
d.
plants.
 

 10. 

Which of the following organisms makes its own food using light energy from the sun?
a.
mushroom
b.
amoeba
c.
leopard
d.
oak
 

 11. 

Which of the following organisms is a heterotroph?
a.
mushroom
b.
alga
c.
wheat
d.
sunflower
 

 12. 

What happens during photosynthesis?
a.
Heterotrophs consume ATP.
b.
Heterotrophs produce ATP.
c.
Autotrophs consume carbohydrates.
d.
Autotrophs produce carbohydrates.
 

 13. 

Plants gather energy with light-absorbing molecules called
a.
pigments.
b.
thylakoids.
c.
chloroplasts.
d.
glucose.
 

 14. 

Plants get the energy they need for photosynthesis by absorbing
a.
high-energy sugars.
b.
chlorophyll a.
c.
chlorophyll b.
d.
sunlight.
 

 15. 

Most plants appear green because chlorophyll
a.
absorbs green light.
b.
absorbs violet light.
c.
does not absorb green light.
d.
does not absorb violet light.
 
 
nar002-1.jpg

Figure 8–2
 

 16. 

Which structure in Figure 8–2 represents a single thylakoid?
a.
structure A
b.
structure B
c.
structure C
d.
structure D
 

 17. 

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

 18. 

The stroma is the region outside the
a.
thylakoids.
b.
chloroplasts.
c.
plant cells.
d.
mitochondria
 

 19. 

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
 

 20. 

What happens when chlorophyll is struck by sunlight?
a.
The electrons in the chlorophyll molecule become energized.
b.
The chlorophyll molecule is broken into two parts.
c.
A chemical reaction turns chlorophyll into high energy carbohydrates.
d.
Energy from fat molecules is released.
 

 21. 

What is the role of NADP+ in photosynthesis?
a.
electron carrier
b.
high-energy sugar
c.
photosystem
d.
pigment
 
 
nar003-1.jpg

Figure 8–3
 

 22. 

Which chemical shown in Figure 8–3 is an electron carrier molecule?
a.
H2O
b.
carbon dioxide
c.
NADP+
d.
oxygen
 

 23. 

What makes certain molecules good electron carriers?
a.
They can accept electrons and transfer most of their energy to another molecule.
b.
They are very large molecules, so they have lots of room to carry many electrons.
c.
The can absorb sunlight, which is where all of the high-energy electrons come from.
d.
They are carbohydrates and have a lot of energy, which allows them to carry electrons.
 

 24. 

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.
 

 25. 

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.
glucose.
 

 26. 

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.
 

 27. 

Which of the following is NOT found in the overall reaction for photosynthesis?
a.
carbon dioxide
b.
water
c.
light
d.
nitrogen
 

 28. 

In the overall equation for photosynthesis, six molecules of carbon dioxide and six molecules of water result in a molecule of sugar and six molecules of
a.
glucose.
b.
water.
c.
oxygen.
d.
ATP.
 
 
A. nar004-1.jpg  B. nar004-2.jpg

Figure 8–4
 

 29. 

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.
 

 30. 

Where do the light-dependent reactions take place?
a.
in the stroma of the chloroplast
b.
within the mitochondria membranes
c.
within the thylakoid membranes
d.
in the outer membrane of the chloroplasts
 

 31. 

What are the products of the light-dependent reactions?
a.
oxygen gas and glucose
b.
ATP, NADPH, and oxygen gas
c.
ATP, carbon dioxide gas, and NADPH
d.
carbon dioxide gas, oxygen gas, and NADPH
 

 32. 

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.
 

 33. 

What action contributes to the inside of the thylakoid membrane becoming 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. 

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

 35. 

Which of the following activities happens within the stroma?
a.
Photosystem I absorbs light.
b.
ATP synthase produces ATP.
c.
The Calvin cycle produces sugars.
d.
Electrons move through the electron transport chain.
 

 36. 

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
 

 37. 

The Calvin cycle is another name for the
a.
light-independent reactions.
b.
light-dependent reactions.
c.
photosynthesis reaction.
d.
electron transport chain.
 

 38. 

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

 39. 

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

 40. 

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

 41. 

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.
Fewer sugars will be produced at first, but then the plant will recover.
 

 42. 

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.
 
 
nar005-1.jpg

Figure 8–5
 

 43. 

In which experimental setup shown above would you expect the Elodea plant inside the test tube to produce the LEAST amount of oxygen?
a.
A
b.
B
c.
C
d.
D
 
 
nar006-1.jpg

Figure 8–6
 

 44. 

Imagine that y-axis of each graph in Figure 8–6 describes the rate of photosynthesis. Which of the graphs represents the effect of temperature on the rate of photosynthesis?
a.
A
b.
B
c.
C
d.
D
 

 45. 

Imagine that y-axis of each graph in Figure 8–6 describes the rate of photosynthesis. Which of the graphs represents the effect of light intensity on the rate of photosynthesis?
a.
A
b.
B
c.
C
d.
D
 

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. 

Carbon dioxide is one of the principal chemical compounds that living things use to store energy. _________________________

 
 
nar001-1.jpg

Figure 8–1
 

 2. 

The majority of the cells have only a small quantity of ATP because the ATP functions better like a molecule to store short-term energy. _________________________

 

 3. 

Ultimately, the energy that a carnivore, such as a wolf, uses comes from sunlight. _________________________

 

 4. 

Plants gather the sun’s energy with light-absorbing molecules called pigments. _________________________

 

 5. 

Chlorophyll a and chlorophyll b both absorb light very well in the blue and red regions of the visible light spectrum. _________________________

 
 
nar007-1.jpg

Figure 8–7
 

 6. 

The structure labeled A in Figure 8–7 contains chlorophyll. _________________________

 

 7. 

If you were to isolate the organelle shown in Figure 8–7, it would appear green. _________________________

 

 8. 

The light-dependent reactions involve adding a hydrogen ion and two high-energy electrons to NADPH. _________________________

 

 9. 

The six carbon atoms needed to make a molecule of glucose come from oxygen in the atmosphere. _________________________

 

 10. 

ATP synthase changes ADP to ATP when light energy passes through it. _________________________

 

 11. 

The light-dependent reactions supply the Calvin cycle with CO2 and ATP. _________________________

 

 12. 

During the light-dependent reactions, plants use the energy in ATP and NADPH to build high-energy sugars. _________________________

 

 13. 

The Calvin cycle provides cells with compounds that can store energy for more than a few minutes. _________________________

 

 14. 

C4 plants have adaptations that let them do photosynthesis even under conditions of intense light and high temperatures, when other plants would stop. _________________________

 
 
nar008-1.jpg

Figure 8–8
 

 15. 

According to the graph in Figure 8–8, the rate of photosynthesis in shade and sun plants decreases and then levels off as light intensity increases. _________________________

 



 
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