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WorksheetsAP Photosynthesis
Total questions: 78
Worksheet time: 2hrs 18mins
Name
Class
Date
1.
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
a)
CO2 and glucose
b)
H2O and O2
c)
electrons and H+
d)
ATP and NADPH
2.
Where does the Calvin cycle take place?
a)
stroma of the chloroplast
b)
thylakoid membrane
c)
outer membrane of the chloroplast
d)
interior of the thylakoid membrane
3.
When oxygen is released as a result of photosynthesis, it is a direct by-product of
a)
reducing NADP+
b)
splitting water molecules
c)
chemiosmosis
d)
electron transfer in photosystem II and I
4.
Which of the following events occurs in the light reactions of photosynthesis?
a)
NADP+ is produced
b)
ATP is consumed to yield ADP
c)
carbon dioxide is fixed in organic molecules
d)
light is absorbed and funneled to reaction-center chlorophyll a
5.
Which of the following is directly associated with Photosystem I?
a)
harvesting light energy to make ATP
b)
receiving electrons from the thylakoid membrane ETC
c)
generation of molecular oxygen
d)
extraction of hydrogen electrons from the splitting of water
6.
What is the primary function of cyclic electron flow?
a)
to produce additional NADPH
b)
to produce additional ATP
c)
to produce additional oxygen
d)
to produce additional carbon dioxide
7.
In a plant cell, where are ATP synthase complexes located?
a)
thylakoid membranes only
b)
inner mitochondrial membranes only
c)
thylakoid membrane and inner mitochondrial membranes
d)
thylakoid membrane and plasma membranes
8.
Which of the following statements about the relationship between photosynthesis and cellular respiration is true?
a)
In cellular respiration the biochemical pathways
of photosynthesis run in reverse.
b)
In photosynthesis the biochemical pathways of
cellular respiration run in reverse.
c)
Cellular respiration occurs only in animals and
photosynthesis occurs only in plants.
d)
Cellular respiration is catabolic and
photosynthesis is anabolic.
9.
Where are the molecules of the electron transport chain associated with photophosphorylation located in plant cells?
a)
thylakoid membanes of chloroplasts
b)
stroma of chloroplasts
c)
matrix of mitochondria
d)
outer membrane of chloroplasts
10.
In photosynthetic cells, synthesis of ATP by chemiosmosis occurs during
a)
photosynthesis only
b)
cellular respiration only
c)
both photosynthesis and cellular respiration
d)
photophosphorylation only
11.
What is the primary function of the Calvin cycle?
a)
regenerate
ATP for use in the light reactions of photosynthesis
b)
produce carbon dioxide for use in the light
reactions of photosynthesis
c)
produce oxygen by oxidizing water
d)
produce simple sugars from carbon dioxide
12.
Where do the enzymatic reactions of the Calvin cycle take place?
a)
stroma of the chloroplast
b)
thylakoid membranes
c)
matrix of the mitochondria
d)
thylakoid space
13.
In C3 photosynthesis, the reactions that require ATP take place in
a)
the light reactions alone
b)
the calvin cycle only
c)
both the light reactions and the calvin cycle
d)
the citric acid cycle
14.
Reactions that consume CO2 take place in
a)
the light reactions of photosynthesis only
b)
the calvin cycle only
c)
the light reactions and the calvin cycle
d)
the calvin cycle and the citric acid cycle
15.
Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?
a)
The
light reactions provide ATP and NADPH to the Calvin cycle, and the Calvin cycle
returns ADP, ℗i,
and NADP+ to the light reactions.
b)
The light reactions provide ATP and NADPH to the
carbon fixation step of the Calvin cycle, and the Calvin cycle provides water
and electrons to the light reactions.
c)
The light reactions supply the Calvin cycle with
CO2 to produce sugars, and the Calvin cycle
supplies the light reactions with sugars to produce ATP.
d)
The light reactions provide the Calvin cycle
with oxygen for carbon fixation, and the Calvin cycle provides the light
reactions with sugars to produce ATP.
16.
CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they
a)
fix CO2 into
organic acids during the night when temperatures are cooler.
b)
fix CO2 into by
combining it with RuBP in the Calvin cycle.
c)
obtain CO2 through their roots during the day.
d)
fix
CO2 into organic acids in the mesophyll cells,
which do not rely on stomata.
17.
Compared to C3 plants, C4 plants
a)
) have higher rates of photorespiration.
b)
can
continue to fix CO2 even at relatively low CO2 concentrations and high oxygen concentrations.
c)
do not use rubisco for carbon fixation.
d)
grow better under cool, moist conditions.
18.
In chemiosmosis in mitochondria, protons flow from the intermembrane space into the matrix, whereas in chemiosmosis in chloroplasts, protons flow from
a)
stroma into the cytosol
b)
stroma to the thylakoid space
c)
thylakoid space to the stroma
d)
intermembrane space to the stroma
19.
In mitochondria, the electron transport chain pumps protons from the matrix into the intermembrane space, whereas in chloroplasts, the electron transport chain pumps protons from
a)
matrix to stroma
b)
stroma to thylakoid space
c)
intermembrane space to stroma
d)
thylakoid space to stroma
20.
Where do the light-dependent reactions occur?
a)
thylakoid membrane
b)
stroma
c)
mesophyll
d)
mitochondria
21.
Which of the following is NOT a product of the light reactions?
a)
ATP
b)
NADPH
c)
Oxygen
d)
Glucose
22.
What supplies the electrons that are lost in PS I?
a)
the electrons from PS II
b)
water
c)
glucose
d)
oxygen
23.
What is the function of NADP+?
a)
It absorbs light
b)
It is an electron carrier
c)
It is a light-reflecting pigment
d)
It acts as long-term energy storage
24.
What is the name of a pigment-containing complex found in a thylakoid?
a)
chlorophyll a
b)
photosystem
c)
grana
d)
stroma
25.
RuBisCO is the most abundant protein on the planet.
a)
True
b)
False
26.
At which location are electrons energized and added to NADP+ ?
a)
Photosystem 1
b)
Photosystem 2
c)
Calvin Cycle
d)
ATP Synthase
27.
Which pigment is most efficient at higher energy areas of the electromagnetic spectrum?
a)
Chlorophyll A
b)
Chlorophyll B
c)
Carotenoids
d)
No pigment is efficient at high energies
28.
During which phase of photosynthesis is O2 created?
a)
Light dependent reactions
b)
Calvin Cycle
c)
Citric Acid Cycle
d)
Glycolysis
29.
The enzyme responsible for Carbon Fixation in C3 Photosynthesis is
a)
RuBisCo
b)
PEP Carboxylase
c)
Hexokinase
d)
Pyruvate DeHydrogenase
30.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
31.
Since we're building a carbohydrate in the Calvin Cycle, is the process endergonic or exergonic and why?
a)
Endergonic because carbohydrate production is catabolic
b)
Exergonic because carbohydrate production is anabolic
c)
Endergonic because carbohydrate production is anabolic.
d)
Exergonic because carbohydrate production is catabolic
32.
If an aquatic plant is placed into a test tube with water near a light source, what will it produce?
a)
Glucose and Oxygen
b)
Carbon dioxide and ATP
c)
Water and Oxygen
d)
Glucose and ATP
33.
Where does carbon dioxide enter plants>
a)
The leaves
b)
Stomata
c)
Roots
d)
Stem
34.
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.
35.
Plants need carbon dioxide from their environment to produce glucose during which stage of photosynthesis?
a)
The light-dependent stage
b)
The light-independent stage (The Calvin Cycle)
c)
The electron transport chain
d)
ATP formation
36.
How many sugar molecules are produced from every six molecules of carbon dioxide that enter the Calvin cycle?
a)
1
b)
3
c)
6
d)
12
37.
What happens to NADPH and ATP after they are used in the Calvin Cycle?
a)
they recycle back to the light reactions
b)
they are used to make G3P
38.
What happens to the remaining G3P molecules in the last step of the dark reactions?
a)
They are used to make glucose.
b)
They are reshuffled to make CO2 by adding ATP.
c)
They exit the cycle.
d)
They are reshuffled to make RuBP by adding ATP.
39.
In green plants, the primary function of the Calvin cycle is to
a)
Use ATP to release carbon
b)
Split water to release oxygen.
c)
Construct simple sugars from carbon dioxide.
d)
Use NADPH to release carbon
40.
Which of the following is NOT a reactant of the calvin cycle?
a)
NADPH
b)
ATP
c)
Oxygen
d)
Carbon dioxide
41.
Which of the following is NOT a product of the calvin cycle?
a)
NADP+
b)
NADPH
c)
ADP
d)
G3P (to form glucose)
42.
What is the product of the Calvin Cycle?
a)
Rubisco
b)
Glyceraldehyde 3-Phosphate (G3P)
c)
Oxygen
d)
Starch
43.
To bring in nonliving carbon (CO2) and use it to make organic compounds is a process called _______________.
a)
carbon fixation
b)
cellular respiration
c)
catabolic reactions
d)
mitosis
44.
Which enzyme joins CO2 and RuBP?
a)
NADP+ reductase
b)
rubisco
c)
ATP synthase
45.
In the Calvin Cycle, carbohydrate molecules are:
a)
Reduced
b)
Oxidized
46.
Which is not a phase of the Calvin Cycle?
a)
Carbon Fixation
b)
Reduction
c)
Regeneration of RuBP
d)
chemiosmosis
47.
Which is not a product of the Calvin Cycle?
a)
ADP
b)
NADP+
c)
G3P
d)
oxygen
48.
The Calvin Cycle takes place in the:
a)
Stroma
b)
Thylakoid
c)
Grana
d)
Lamella
49.
Which substance from the light-dependent reactions of photosynthesis is a source of energy for the light-independent reactions?
a)
ADP
b)
H2O
c)
NADPH
d)
pyruvic acid
50.
How many carbons does G3P have?
a)
1
b)
2
c)
3
d)
6
51.
When carbon first enters the Calvin cycle, what molecule does it combine with?
a)
PGA
b)
G3P
c)
RuBP
d)
ATP
52.
Which of the following is considered a waste product of photosynthesis?
a)
glucose
b)
oxygen
c)
carbon dioxide
d)
sunlight
53.
Step 1 of the Calvin Cycle
a)
Carbon Fixation
b)
Regeneration
c)
Reduction
54.
Step 2 of the Calvin Cycle
a)
Carbon Fixation
b)
Regeneration
c)
Reduction
55.
Step 3 of the Calvin Cycle
a)
Carbon Fixation
b)
Regeneration
c)
Reduction
56.
In the Calvin Cycle, ________ and ________ from the light dependent reactions convert PGA into G3P
a)
O2, ATP
b)
CO2, H2
c)
ADP, NADPH
d)
NADPH, ATP
57.
The 5-Carbon molecules that the Calvin Cycle starts and ends with, is called _____________.
a)
PGA
b)
G3P
c)
RuBP
d)
RuDp
58.
The CO2 used in the Calvin Cycle originates from ___________.
a)
The light phase
b)
The breakdown of the remaining G3P's
c)
Diffusion through the stoma
d)
Lumen of the Thylakoid
59.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)
6CO2 + 6H2O --> 6O2 + C6H12O6
b)
6CO2 + C6H12O6 + 6H2O --> O2
c)
6O2 + 6H2O --> 6CO2 + C6H12O6
d)
C6H12O6 + 6O2 ---> 6H2O + 6CO2
60.
Which plant structure is extremely necessary for photosynthesis to take place?
a)
leaves
b)
flower petals
c)
anthers
d)
pistils
61.
It is important to create a concentration of H+ in the thylakoid space so that the H+ can diffuse through_________ to create ______.
a)
ATP synthase, ATP
b)
NADH, NADPH
c)
proton pump, protons
62.
Where do the light-dependent reactions occur?
a)
thylakoid membrane
b)
stroma
c)
mesophyll
d)
mitochondria
63.
Why are C4 plants able to photosynthesize with no apparent photorespiration?
a)
They do not participate in the Calvin cycle.
b)
They use PEP carboxylase to initially fix CO2.
c)
They are adapted to cold, wet climates.
d)
They conserve water more efficiently.
64.
CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they
a)
fix CO2 into organic acids during the night.
b)
fix CO2 into sugars in the bundle�sheath cells.
c)
fix CO2 into pyruvate in the mesophyll cells.
d)
use photosystem I and photosystem II at night.
65.
Which statement describes the functioning of photosystem II?
a)
Light energy excites electrons in the thylakoid membrane electron transport chain.
b)
Photons are passed along to a reaction�center chlorophyll.
c)
The P680 chlorophyll donates a pair of protons to NADP+, which is thus converted to NADPH.
d)
The electron vacancies in P680+ are filled by electrons derived from water.
66.
The accumulation of free oxygen in Earth's atmosphere began
a)
with the origin of life and respiratory metabolism.
b)
with the origin of photosynthetic bacteria that had photosystem I.
c)
with the origin of cyanobacteria that had both photosystem I and photosystem II.
d)
with the origin of chloroplasts in photosynthetic eukaryotic algae.
67.
What supplies the electrons that are lost in PS I?
a)
the electrons from PS II
b)
water
c)
glucose
d)
oxygen
68.
How is a molecule reduced?
a)
electrons are given to the molecule
b)
electrons are taken from the molecule
c)
money is taken from the molecule
d)
protons are given to the molecule
69.
How is a molecule oxidized?
a)
Electrons are added to the molecule
b)
Electrons are taken from the molecule
c)
Electrons are shared with the molecule
d)
Protons are added to the molecule
70.
At which location are electrons energized and added to NADP+ ?
a)
Photosystem 1
b)
Photosystem 2
c)
Calvin Cycle
d)
ATP Synthase
71.
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.
72.
If an aquatic plant is placed into a test tube with water near a light source, what will it produce?
a)
Glucose and Oxygen
b)
Carbon dioxide and ATP
c)
Water and Oxygen
d)
Glucose and ATP
73.
In mitochondria, the electron transport chain pumps protons from the matrix into the intermembrane space, whereas in chloroplasts, the electron transport chain pumps protons from
a)
matrix to stroma
b)
stroma to thylakoid space
c)
intermembrane space to stroma
d)
thylakoid space to stroma
74.
Compared to C3 plants, C4 plants
a)
) have higher rates of photorespiration.
b)
can
continue to fix CO2 even at relatively low CO2 concentrations and high oxygen concentrations.
c)
do not use rubisco for carbon fixation.
d)
grow better under cool, moist conditions.
75.
CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they
a)
fix CO2 into
organic acids during the night when temperatures are cooler.
b)
fix CO2 into by
combining it with RuBP in the Calvin cycle.
c)
obtain CO2 through their roots during the day.
d)
fix
CO2 into organic acids in the mesophyll cells,
which do not rely on stomata.
76.
Reactions that consume CO2 take place in
a)
the light reactions of photosynthesis only
b)
the calvin cycle only
c)
the light reactions and the calvin cycle
d)
the calvin cycle and the citric acid cycle
77.
In C3 photosynthesis, the reactions that require ATP take place in
a)
the light reactions alone
b)
the calvin cycle only
c)
both the light reactions and the calvin cycle
d)
the citric acid cycle
78.
What is the primary function of the Calvin cycle?
a)
regenerate
ATP for use in the light reactions of photosynthesis
b)
produce carbon dioxide for use in the light
reactions of photosynthesis
c)
produce oxygen by oxidizing water
d)
produce simple sugars from carbon dioxide
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