Transcript Organisms, such as plants, that make their own food are called

Organisms, such as plants, that
make their own food are called
1.
2.
3.
4.
1
autotrophs.
heterotrophs.
thylakoids.
pigments.
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3
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3
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Organisms that cannot make their own food
and must obtain energy from the foods they
eat are called
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1. autotrophs.
2. heterotrophs.
3. thylakoids.
4. plants.
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Which of the following is an
autotroph?
1.
2.
3.
4.
1
mushroom
impala
leopard
tree
2
3
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5
25%
1
25%
25%
2
3
25%
4
Which of the following is NOT
an example of a heterotroph?
1.
2.
3.
4.
1
mushroom
leopard
grass
human
2
3
4
5
25%
1
25%
25%
2
3
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4
What are the three parts of an
ATP molecule?
1. adenine, thylakoids,
stroma
2. stroma, grana,
chlorophyll
3. adenine, ribose,
phosphate groups
4. NADH, NADPH, and
FADH2
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2
3
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Which of the following is NOT a
part of an ATP molecule?
1.
2.
3.
4.
1
adenine
ribose
chlorophyll
phosphate
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3
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Energy is released from ATP
when
1. a phosphate group
is added.
2. adenine bonds to
ribose.
3. ATP is exposed to
sunlight.
4. a phosphate group
is removed.
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Which of the following is NOT a
true statement about ATP?
1.
ATP consists of ribose, adenine,
and phosphate.
ADP forms when ATP releases
energy.
ATP provides energy for the
mechanical functions of cells.
Used ATP is discarded by the cell
as waste.
2.
3.
4.
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Figure 8–1
Look at Figure 8–1. All of the following
are parts of an ADP molecule EXCEPT
1.
2.
3.
4.
1
structure A.
structure B.
structure C.
structure D.
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Which structures shown in Figure
8–1 make up an ATP molecule?
1.
2.
3.
4.
1
A and B
A, B, and C
A, B, C, and D
C and D
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3
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1
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3
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In Figure 8–1, between which parts of the
molecule must the bonds be broken to form
an ADP molecule?
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1. A and B
2. B and C
3. C and D
4. all of the above
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4
Jan van Helmont concluded that
plants gain most of their mass from
1. water.
2. the soil.
3. carbon dioxide in
the air.
4. oxygen in the air.
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Which scientists showed that
plants need light to grow?
1. van Helmont and
Calvin
2. Priestley and
Ingenhousz
3. van Helmont and
Priestley
4. Priestley and Calvin
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Ingenhousz showed that plants produce
oxygen bubbles when exposed to
1.
2.
3.
4.
1
ATP.
carbon dioxide.
light.
a burning candle.
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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?
25%
1.
Different plants require different
amounts of water.
Different plants release different
amounts of carbon dioxide.
Different plants require different
amounts of light.
Different plants release different
amounts of oxygen.
2.
3.
4.
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5
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3
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4
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
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1. oxygen.
2. carbon dioxide.
3. ATP.
4. vaporized water.
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Photosynthesis uses sunlight to convert
water and carbon dioxide into
1. oxygen.
2. high-energy sugars
and starches.
3. ATP and oxygen.
4. oxygen and highenergy sugars and
starches.
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Which of the following is(are) used in the
overall reactions for photosynthesis?
1.
2.
3.
4.
1
carbon dioxide
water
light
all of the above
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3
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In the overall equation for photosynthesis,
six molecules of carbon dioxide result in six
molecules of
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1. glucose.
2. water.
3. oxygen.
4. ATP.
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Plants gather the sun’s energy with
light-absorbing molecules called
1.
2.
3.
4.
1
pigments.
thylakoids.
chloroplasts.
glucose.
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4
Plants take in the sun’s energy
by absorbing
1. high-energy
sugars.
2. chlorophyll a.
3. chlorophyll b.
4. sunlight.
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Most plants appear green
because chlorophyll
1. does not absorb
green light.
2. reflects violet
light.
3. absorbs green
light.
4. none of the above
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Which region of the visible spectrum is
not absorbed well by chlorophyll?
1.
2.
3.
4.
1
blue
violet
green
red
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3
4
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A granum is a
1. stack of
chloroplasts.
2. stack of thylakoids.
3. membrane enclosing
a thylakoid.
4. photosynthetic
pigment molecule.
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The stroma is the region outside
the
1.
2.
3.
4.
1
thylakoids.
chloroplasts.
plant cells.
all of the above
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Where in the chloroplast is
chlorophyll found?
1.
2.
3.
4.
1
in the stroma
in the thylakoid
in the ATP
in the glucose
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Which of the following is false?
1. A chloroplast
contains stroma.
2. A stroma contains a
thylakoid.
3. A granum contains
several thylakoids.
4. A thylakoid contains
chlorophyll.
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Where do the light-dependent
reactions take place?
1. in the stroma
2. in the mitochondria
3. within the thylakoid
membranes
4. only in chlorophyll
molecules
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What are the products of the
light-dependent reactions?
1.
2.
3.
4.
1
oxygen gas
ATP
NADPH
all of the above
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Which step is the beginning of
photosynthesis?
1.
Pigments in photosystem I absorb
light.
Pigments in photosystem II absorb
light.
High-energy electrons move through
the electron transport chain.
ATP synthase allows H+ ions to pass
through the thylakoid membrane.
2.
3.
4.
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Which of the following is NOT a step in
the light-dependent reactions?
1.
High-energy electrons move through the
electron transport chain.
Pigments in photosystem II absorb light.
ATP synthase allows H+ ions to pass through
the thylakoid membrane.
ATP and NADPH are used to produce highenergy sugars.
2.
3.
4.
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5
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1
2
3
4
Which of the following is inside
the thylakoid membrane?
1. electron transport
chain
2. photosystem I
3. ATP synthase
4. all of the above
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Why does the inside of the thylakoid
membrane become positively charged
during the light-dependent reactions?
H+ ions are released as
water splits.
ATP synthase allows H+
ions to pass through the
membrane.
ATP synthase produces
ATP from ADP.
Carbon dioxide builds
up in the stroma.
1.
2.
3.
4.
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Which pathway represents the flow
of electrons during photosynthesis?
H2 O  Photosystem I
 Photosystem II
O2  ADP  Calvin
cycle
Photosystem I  Calvin
cycle  NADPH
H2 O  NADPH 
Calvin cycle
1.
2.
3.
4.
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Where are photosystems I and
II found?
1. in the stroma
2. in the thylakoid
membrane
3. in the Calvin cycle
4. all of the above
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The Calvin cycle is another
name for
1. light-independent
reactions.
2. light-dependent
reactions.
3. photosynthesis.
4. all of the above
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The Calvin cycle takes place in
the
1. stroma.
2. photosystems.
3. thylakoid
membranes.
4. chlorophyll
molecules.
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What is a product of the Calvin
cycle?
1. oxygen gas
2. ATP
3. high-energy
sugars
4. carbon dioxide
gas
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How does the Calvin cycle differ
from the light-dependent reactions?
1. It takes place in
the stroma.
2. It takes place in
chloroplasts.
3. It requires light.
4. It takes place in
the thylakoid.
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4
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?
1.
2.
3.
More sugars will be produced.
No sugars will be produced.
The same number of sugars will be
produced but without carbon dioxide.
Carbon dioxide does not affect the
production of high-energy sugars in
plants.
4.
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2
3
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4
Which of the following affects
the rate of photosynthesis?
1.
2.
3.
4.
1
water
temperature
light intensity
all of the above
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3
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4
If you continue to increase the intensity of
light that a plant receives, what happens?
1.
The rate of photosynthesis
increases with light intensity.
The rate of photosynthesis
decreases with light intensity.
The rate of photosynthesis
increases and then levels off.
The rate of photosynthesis does not
change.
2.
3.
4.
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4
What would you expect to happen to plants
at temperatures greater than 45°C?
1.
25%
They will have a very high rate of
photosynthesis.
They will have a less than optimal rate of
photosynthesis.
They will have a high rate of
photosynthesis if light intensity is also
great.
They will have an optimal rate of
photosynthesis if water is available.
2.
3.
1
4.
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3
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2
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3
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4
Figure 8–2
Which of the graphs in Figure 8–2
represents the effect of temperature on the
rate of photosynthesis?
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25%
25%
1. A
2. B
3. C
4. D
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2
3
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5
1
2
3
4
Which of the graphs in Figure 8–2
represents the effect of light intensity on the
rate of photosynthesis?
25% 25%
25%
25%
1. A
2. B
3. C
4. D
1
2
3
4
5
1
2
3
4
The energy in most food comes originally
from sunlight.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
Heterotrophs require oxygen.
_________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
ADP is one of the principal chemical
compounds that living things use to store
energy. _________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
Figure 8–1
The substance represented in Figure 8–1 is
called ATP. _________________________
1. True
2. False
1
2
3
4
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5
1
50%
2
If a plant and a burning candle are placed under a bell jar,
the candle will burn because the plant gives off carbon
dioxide. _________________________
1. True
2. False
1
2
3
4
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5
1
50%
2
Plants gather the sun’s energy with lightabsorbing molecules called pigments.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
A plant whose leaves are naturally yellow probably contains
chlorophyll as well as other light-absorbing pigments.
_________________________
1. True
2. False
1
2
3
4
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5
1
50%
2
If you grind up the chloroplasts found in spinach
leaves into a liquid solution, the solution will have a
green color. _________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
Figure 8–3
The structure labeled A in Figure 8–3
contains chlorophyll.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
If you were to isolate the structure shown in
Figure 8–3, it would appear green.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
ATP synthesis depends directly on the
availability of light energy.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
The light-dependent reactions supply the
Calvin cycle with CO2 and ATP.
_________________________
1. True
50%
50%
2. False
1
2
3
4
5
1
2
During the light-dependent reactions, plants use
the energy in ATP and NADPH to build highenergy sugars. _________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
The Calvin cycle provides cells with compounds
that can store energy for more than a few minutes.
_________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
If a plant is placed in a greenhouse held at 40°C,
the plant will probably increase its normal rate of
photosynthesis. _________________________
1. True
2. False
1
2
3
4
50%
5
1
50%
2
Participant Scores
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Participant 1
Participant 2
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Participant 3
Participant 4
Participant 5
Organisms, such as hawks and leopards, that
obtain energy from the foods they consume are
called ____________________.
1
2
3
4
5
0 of 5
Cells keep only a small amount of
____________________ on hand and regenerate
it as needed by using carbohydrates.
1
2
3
4
5
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_________________________ concluded
that plants gain most of their mass from
water alone.
1
2
3
4
5
0 of 5
Ingenhousz found that plants produce
oxygen only in the presence of
____________________.
1
2
3
4
5
0 of 5
Photosynthesis uses the energy of sunlight
to convert water and carbon dioxide into
oxygen and _________________________.
1
2
3
4
5
0 of 5
Photosynthesis requires light, water, carbon
dioxide, and ____________________.
1
2
3
4
5
0 of 5
If you separate the pigments found in a typical plant cell’s
chloroplasts, you will find ____________________,
orange, and red pigments.
1
2
3
4
5
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____________________ are photosynthetic
membranes inside chloroplasts.
1
2
3
4
5
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Thylakoids are arranged in stacks
known as ____________________.
1
2
3
4
5
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Thylakoids are a ____________________
color because they contain chlorophyll.
1
2
3
4
5
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Figure 8–3
Photosystems I and II are found in the
structure labeled ____________________
in Figure 8–3.
1
2
3
4
5
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The area in Figure 8–3 labeled A is
called the ____________________.
1
2
3
4
5
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A membrane protein called _____________________
allows H+ ions to pass through the thylakoid membrane out
of the thylakoids.
1
2
3
4
5
0 of 5
The electrons that chlorophyll loses to the
electron transport chain are replenished by
____________________ molecules.
1
2
3
4
5
0 of 5
In many plants, the rate of photosynthesis
____________________ when the weather
becomes very cold.
1
2
3
4
5
0 of 5
What is the difference between an autotroph
and a heterotroph? Give an example of each
type of organism
1
2
3
4
5
0 of 5
Explain how heterotrophs get their energy
from the sun even though they cannot make
their own food.
1
2
3
4
5
0 of 5
List four organisms that are
heterotrophs.
1
2
3
4
5
0 of 5
What happens when a phosphate group is
removed from an ATP molecule?
1
2
3
4
5
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What is ATP, and when is
energy released from it?
1
2
3
4
5
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Write the overall equation for photosynthesis
in both symbols and words.
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2
3
4
5
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Why are six carbon dioxide molecules
required to make one glucose molecule?
1
2
3
4
5
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A student exposed two plants to only red
light and two plants to only green light.
Which plants should grow better? Why?
1
2
3
4
5
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Figure 8–3
Identify the structure shown in Figure
8–3 and describe its function.
1
2
3
4
5
0 of 5
Compare photosystems I and II.
1
2
3
4
5
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Photosystems I and II are both located in the
thylakoid membrane. What advantage does
their proximity provide?
1
2
3
4
5
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What is the role of hydrogen ions in
the conversion of ADP to ATP?
1
2
3
4
5
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What does the Calvin cycle do?
1
2
3
4
5
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Describe the relationship between the lightdependent and the light-independent
reactions.
1
2
3
4
5
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List two factors that affect the
rate of photosynthesis.
1
2
3
4
5
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Discuss the relationship between autotrophs and
heterotrophs. Do heterotrophs depend on
autotrophs for their survival? Explain your answer
1
2
3
4
5
0 of 5
Compare the storage capacity of ATP and
glucose. How does the cell use each of
these molecules to store energy?
1
2
3
4
5
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Describe the experiments of van Helmont, Priestley, and
Ingenhousz. How did the work of these scientists contribute
to our current understanding of photosynthesis?
1
2
3
4
5
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Describe how pigments obtain energy from
light. Use chlorophyll as an example of the
process you describe.
1
2
3
4
5
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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?
1
2
3
4
5
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Trace the events that occur in the thylakoid
membrane during the light-dependent
reactions.
1
2
3
4
5
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What happens to the electrons in a chlorophyll molecule
when light shines on it? Does the chlorophyll molecule ever
run out of electrons? Explain your answer
1
2
3
4
5
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Describe the activities that take place in the
stroma in (a) bright sunlight and in (b)
darkness.
1
2
3
4
5
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Identify three factors that affect the rate of
photosynthesis and explain the effect of
each.
1
2
3
4
5
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Following an overnight freeze, some plants often die. Some people
water the plants thoroughly before and after the freeze. Explain how
providing a plant with extra water before and after an overnight freeze
could help it survive a freeze.
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5
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