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1. What is the name given to organisms that can make
their own food and thus sustain themselves without
consuming organic molecules derived from other
organisms?
a.
b.
c.
d.
Chemotrophs
Heterotrophs
Synthesizers
Autotrophs
Correct answer: D
2. In most green plants, chloroplasts are
a. Concentrated in a zone of leaf tissue called the
mesophyll
b. Concentrated in a portion of the leaf called the stroma
c. Evenly distributed throughout the leaf tissue
d. Evenly distributed throughout the entire plant
Correct answer: A
3. __________ cells in leaves are specialized for
photosynthesis.
a.
b.
c.
d.
Companion
Mesophyll
Sclerenchyma
Tracheid
Correct answer: B
4. Carbon dioxide and oxygen escape from a leaf via
a.
b.
c.
d.
Stomata
Thylakoids
Grana
Stroma
Correct answer: A
5. In the chloroplast, sugars are made in a compartment
that is filled with a thick fluid called the
a.
b.
c.
d.
Stomata
Thylakoid
Matrix
Stroma
Correct answer: D
6. Thylakoids are arranged in stacks called
a.
b.
c.
d.
Cristae
Stomata
Grana
Vacuoles
Correct answer: C
7. Where is chlorophyll found in a plant cell?
a.
b.
c.
d.
Stroma
Thylakoid membranes
Cytoplasm
Crsitae
Correct answer: B
8. The oxygen released into the air as a product of
photosynthesis comes from
a.
b.
c.
d.
Water
Glucose
Carbon dioxide
Chlorophyll
Correct answer: A
9. A redox reaction involves the transfer of
a.
b.
c.
d.
Oxygen
Water
An electron
Carbon dioxide
Correct answer: C
10. The light reactions occur in the _____, while the Calvin
cycle occurs in the ______________
a.
b.
c.
d.
Stroma; thylakoid membranes
Stroma; nucleus
Cytoplasm; thylakoid membrane
Thylakoid membrane; stroma
Correct answer: D
11. Which of the following is part of the light reaction?
a.
b.
c.
d.
Carbon fixation
Reduction of carbon
Regeneration of NADP+
Formation of waste products in the form of oxygen
Correct answer: D
12. Carbon fixation
a. Occurs when carbon atoms from CO2 are incorporated
into an organic molecule
b. Supplies the cell with ATP
c. Occurs during the light reactions
d. Provides the cell with a supply of NADPH molecules
Correct answer: A
13. Why are most plants green?
a. Chlorophyll a reflects green light
b. Chlorophyll a absorbs green light
c. Chlorophyll b primarily uses green light as the source of
energy for photosynthesis
d. Green helps plants blend into their environment as a
sort of camouflage.
Correct answer: A
14. Which of the following colors contributes the LEAST
energy to photosynthesis?
a.
b.
c.
d.
Blue
Red
Orange
Green
Correct answer: D
15. Clusters of light-gathering pigments in a photosystem
a.
b.
c.
d.
Pass energy to the reaction center
Are found in the roots of plants
Absorb electrons
Break down water
Correct answer: A
16. Which of the following molecules is a product of
photosynthesis?
a.
b.
c.
d.
CO2 and chlorophyll
Glucose and Oxygen
Oxygen and CO2
Glucose and CO2
Correct answer: B
17. Arrange the following steps of the Calvin Cycle in
correct order:
1. Carbon fixation
2. Regeneration of RuBP
3. Release of G3P
4. Reduction
a.
b.
c.
d.
1,2,3,4
1,3,4,2
1,4,3,2
4,1,2,3
Correct answer: C
18. Arrange the following steps of the light reaction in
correct order:
1. Light excites an electron from photosystem I
2. Light excites an electron from photosystem II
3. Electrons reduce NADP+ to NADPH
4. Electrons pass through an electron transport chain,
which generates a H+ gradient used to make ATP
a.
b.
c.
d.
1,2,3,4
1,4,2,3
2,4,1,3
2,3,1,4
Correct answer: C
19. Chlorophyll is located in ______, which are found in
________, which are concentrated in ___________
a.
b.
c.
d.
Thylakoids, chloroplasts, mesophyll
Chloroplasts, thylakoids, mesophyll
Mesophyll, chloroplasts, thylakoids
Mesophyll, thylakoids, chloroplasts
Correct answer: A
20. Photorespiration
a. May be an evolutionary relic from when atmospheric
oxygen levels were low
b. Is of benefit to the plant since it breaks down rubisco
c. Is attributable to high CO2 levels
d. Produce glucose
Correct answer: A
21. The addition of oxygen instead of carbon dioxide to
RuBP results in
a. Cellular respiration
b. Photorespiration
c. Photophosphorylation
d. Aerobic respiration
Correct answer: B
22. What is the main advantage of the C4 and CAM
photosynthesis strategies over the C3 strategy?
a. They help the plant synthesize glucose efficiently under
dry conditions
b. They allow the plant to fix carbon under conditions of
low CO2
c. They allow the plant to fix carbon in cool conditions
d. They make it possible for the plant to use the Calvin
cycle at night
Correct answer: A
23. The ultimate source of all the food that we eat and the
oxygen we breathe is
a. Cellular respiration
b. Photosynthesis
c. Glycolysis
d. Anaerobic respiration
Correct answer: B
24. To produce one glucose, the Calvin cycle needs to run
_______ times.
a.
b.
c.
d.
Two
Three
Six
Eight
Correct answer: C
25. ATP and NADPH
a. Power sugar synthesis during the Calvin cycle
b. Are products of the Calvin cycle
c. Provide energy to photosystem I and photosystem II
d. Are used in the electron transport chain to pump H+ into
the thylakoid space
Correct answer: A