CHAPTER 7, PHOTOSYNTHESIS QUIZ
CIRCLE THE CORRECT ANSWER
1. What are the products of photosynthesis?
water and carbon dioxide
water and oxygen
oxygen and carbohydrate
carbohydrate and water
2. What organisms are capable of photosynthesis?
plants only
plants and algae only
plants and some bacteria only
plants, algae, and some bacteria
3. Sunlight arrives at a plant in units of light energy called
protons
photons
electrons
wavelengths
4. The Greek root that means "light" is
synthesis
logos
kytos
phos
elektr A
5. Which statement is Not true about sunlight?
Gamma rays are shorter than the wavelengths of visible light.
Only the visible portion of sunlight is used in photosynthesis.
Photons of ultraviolet light contain low energy, and so are harmless to cells.
Shorter wavelengths of radiation contain more energy than longer wavelengths.
Radio waves have longer wavelengths than go gamma rays.
6. Which of these is Not a major photosynthetic pigment in plants?
chlorophyll "a"
chlorophyll "b"
chlorophyll "c"
carotenoid pigments
7. Why are plants green?
They absorb only green wavelengths of light.
They absorb only yellow and blue wavelengths of light.
They reflect nearly all wavelengths of light.
They reflect green wavelengths of light.
They reflect yellow and blue wavelengths of light.
8. The term "chloroplast" is derived in part from the Greek root that means
plant
light
green
photosyntheti C
oxygen
9. To what does the term stroma refer?
the double membrane of the chloroplasts
a flattened disk or sac in the chloroplast
a central fluid filled space in the chloroplast
the cytochrome system in the membranes of the thylakoids
a stack of thylakoid membrane structures
10. To what does the term grana refer?
the cytochrome system in the membranes of the thylakoids
a central fluid filled space in the chloroplast
a flattened disk or sac in the chloroplast
the double membrane of the chloroplasts
a stack of thylakoid membrane structures
11. Which of these is most closely associated with the process of electron transport?
a stack of thylakoid membrane structures
a flattened disk or sac in the chloroplast
the double membrane of the chloroplasts
the cytochrome system in the membranes of the thylakoids
a central fluid filled space in the chloroplast
12. Which statement is Not true about photosystems?
Photosystem I passes electron on to photosystem II.
Each photosystem contains numerous pigment molecules that act as antennas to capture light.
Photosystem I contains a reaction center molecule
that absorbs light best around 700 nm, so
it is called P700.
electrons in the reaction center molecule are excited
by absorbing photons of light and are passed
along to an acceptor molecule.
13. Protons (H+) accumulate in the thylakoid space during electron transport
between
photosystem I and II. The excess protons in the thylakoid space
enters the photorespiration pathway.
converts NADP to NADPH and generates ATP in the process.
is small enough to diffuse back out through the lipid bilayer.
raises the pH of the space until the processes stop.
moves from the thylakoid space to the stroma through
an ATP synthase complex channel
that generates ATP
14. Which statement is Not true about the cyclic electron pathway?
It produces ATP.
It involves Photosystem I.
It produces NADPH.
It is believed to be the first of the two electron transport pathways to have developed.
15. Which statement is Not true about the noncyclic electron pathway?
It absorbs photons into Photosystem I.
It absorbs photons into Photosystem II.
It produces ATP.
It produces NADPH.
It produces carbohydrates through carbon dioxide fixation.
16. Which is Not true about photosynthesis?
In the noncyclic photophosphorylation, water is split and oxygen is released.
Photosystem II makes noncyclic photophosphorylation
more efficient than does
cyclic photophosphorylation.
The cyclic system is used when there is insufficient
NADP+ present to absorb
electrons in plants cells.
More carbohydrate is produced during cyclic photophosphorylation
than during
noncyclic photophosphorylation.
17. Which is most closely associated with the Calvin cycle?
ATP production.
oxygen production.
carbon dioxide fixation.
carbon dioxide production
removal of electrons from water for passage through an electron transport system.
18. The end product of the Calvin cycle is
ATP
ribulose bisphosphate (RuBP)
phosphoglyceraldehyde (PGAL)
PEP carboxylase (PEPcase)
carbon dioxide
19. When the stomates in a leaf close, then
carbon dioxide in the air spaces in the leaf decreases.
oxygen in the air spaces in the leaf increases.
C3 plants carry on photorespiration. using oxygen and producing PGA and carbon dioxide.
all photosystems as well as photorespiration come to a halt.
A, B, and C are correct.
20. The major enzyme that catalyzes the reduction of carbon dioxide is called
ribulose bisphosphate (RuBP)
phosphoglyceraldehyde (PGAL)
PEP carboxylase (PEPcase)
21. The first event in the Calvin cycle is the attachment of carbon
dioxide to the five carbon
RuBP molecule, which
forms a six carbon molecule that immediately breaks down into two three carbon PGA molecules.
is a reaction assisted by large quantities of RuBP carboxylase enzyme.
decreases cell carbon dioxide levels, which increases the diffusion gradient.
immediately becomes a six carbon sugar that is the base for starch, sucrose, cellulose, etc.
A, B, and C are correct.
22. Most food plants, such as wheat, oats, and rice, are in the group of
CAM plants.
C3 plants
C4 plants
I don't know?
23. Which statement is Not true about C3 and C4 plants?
C3 plants are more successful in mild climates that C4 plants.
C4 plants contain chloroplasts only in part of their mesophyll cells.
C3 plants fix carbon dioxide in the mesophyll cells.
C3 plants make glucose in the bundle sheath cells.
The first carbon dioxide fixation product in a C4 plant is oxaloacetate.
24. Which would be a CAM plant?
cactus
corn
rice
wheat
oak tree
25. The absorption spectrum of chlorophyll
is not the same as that of carotenoids.
approximates the action spectrum of photosynthesis.
explains why chlorophyll is a green pigment.
shows that some colors of light are absorbed more than others.
All of these are correct.
26. The final acceptor of electrons during the noncyclic electron pathway is
Photosystem I
Photosystem II
ATP
NADP+
water
27. A photosystem contains
pigments, a reaction center, and an electron acceptor
ADP, phosphate, and hydrogen ions (H+).
protons, photons, and pigments.
cytochromes only.
Both B and C are correct.
28. Which of these should be associated with the electron transport system?
chloroplasts
cytochromes
movement of H+ into the thylakoid space
formation of ATP
absorption of solar energy
29. The NADPH and ATP from the light-dependent reactions are used to
split water
cause RuBP carboxylase to fix carbon dioxide
re-form the photosystems
cause electrons to move along their pathways
convert PGA to PGAL
30. CAM photosynthesis
is the same as C4 photosynthesis
is an adaptation to cold environments in the southern hemisphere
is prevalent in desert plants that close their stomates during the day
occurs in plants that live in marshy areas
stands for chloroplasts and mitochondria
31. Chemiosmosis
depends on protein complexes in the thylakoid membrane.
depends on an electrochemical gradient.
depends on a difference in H+ concentration between the thylakoid space and stroma.
results in ATP formation.
All of these are correct.
32. Fossil fuels are full of energy stored from photosynthesis millions
of years ago.
True False
33. The energy content of photons is inversely proportional to the wavelength
of the radiation.
True False
34. Short wavelength radiation has lower energy content than long wavelength
radiation.
True False
35. Only photons from portions of visible light can be taken up by chlorophyll.
True False
36. Chlorophyll "b" is the pigment most involved in the reaction centers
of photosystems.
True False
37. The light dependent reactions of photosynthesis occur in the stroma
of chloroplast.
True False
38. The light dependent reactions occur after the light independent
reactions in the process of photosynthesis.
True False
39. The first part of the noncyclic electron pathway involves the removal
of electrons from water.
True False
40. Some bacteria use noncyclic photophosphorylation, which does not
produce oxygen or split water molecules.
True False
41. Chemiosmotic ATP synthesis occurs in the cytosol of the cell.
True False
42. The enzyme complex called ATP synthetase is located in the thylakoid
membranes.
True False
43. Carbon dioxide first binds to a five carbon molecule, forming a
six carbon molecule that splits
to form two three carbon molecules.
True False
44. Photorespiration is the process by which light is used to release
the stored energy in carbohydrate
molecules to perform all work in plant cells.
True False
45. Which of the following is the source of oxygen produced during photosynthesis?
H2O
H2O2
CO2
CO
HCO3-
46. Which of the following is the difference between C3 and C4 plants?
The first step of the Calvin cycle.
The elevation at which they live.
The kind of chloroplasts they contain.
The first step of the light reactions.
The product of the Calvin cycle.
47. This process couples the production of ATP with the movement of
electrons down the
electron transport chain by harnessing the driving force created by
a proton gradient.
glycolysis
chemiosmosis
fermentation
Calvin cycle
photolysis
48. This process has as its products NADP+ and ADP, and sugar.
glycolysis
chemiosmosis
fermentation
Calvin cycle
photolysis
49. CAM plants are unique in that they
Use rubisco as the chief enzyme in photosynthesis.
Store CO2 collected at night as acid, and use it during the day for photosynthesis.
Close their stomata at night and open them by day.
Have bundle sheath cells to assist in photosynthesis.
Do not use photosystem I at all.
50. Which of the following photosynthetic reactions is known to occur in the thylakoid membrane?
carbon fixation
light reactions
dark reactions
Calvin cycle
transpiration
51. Which of the following processes is carried out more efficiently by a C4 plant than by a C3 plant?
light absorption
chemiosmotic coupling
photolysis
fixation of carbon dioxide (CO2)
transport of sugars
52. On a sunny day, the closing of stomata in plant leaves result in
a decrease in CO2 intake
a shift from C3 photosynthesis to C4 photosynthesis
an increase in transpiration
an increase in the concentration of CO2 in mesophyll cells
an increase in the rate of production of starch
53. The process in which O2 (oxygen) is released as a by product of oxidation-reduction reactions.
glycolysis
Krebs cycle (citric acid cycle)
Calvin cycle (light-independent reactions of photosynthesis)
light dependent reactions of photosynthesis
chemiosmosis
54. Process in which carbon from CO2 is incorporated into organic molecules.
glycolysis
Krebs cycle (citric acid cycle)
Calvin cycle (light-independent reactions of photosynthesis)
light dependent reactions of photosynthesis
chemiosmosis
55. Process found in both photosynthesis and cellular respiration.
glycolysis
Krebs cycle (citric acid cycle)
Calvin cycle (light-independent reactions of photosynthesis)
light dependent reactions of photosynthesis
chemiosmosis
56. The products of the light reactions in photosynthesis are
oxygen and NADP+
water and NADPH
oxygen and NADPH
water and oxygen
oxygen and NAD+
57. Which of the following statements is True about RuBP (ribulose bisphosphate)
It is a 3 carbon product of the Calvin cycle.
It is the final oxidizing agent in the light reaction.
It is the CO2 acceptor in the Calvin cycle.
It is the rarest substrate in the Calvin cycle and therefore a limiting reagent.
None of the above.
58. If 6 molecules of oxygen are released during photosynthesis, how
many molecules of
carbon dioxide would be fixed?
1
3
6
12
24
59. Which of the following statements is true concerning plants that utilize C4 photosynthesis?
They only open their stomata at night.
The use bundle sheath cells to separate the Calvin cycle from the atmosphere.
They use rubisco (ribulose bisphosphate carboxylase
oxygenase) to capture the carbon
dioxide from the atmosphere.
There are more C4 plants in temperate deciduous forests
because of the mild heat and
available moisture.
All of the above.
60. The basic photosynthetic unit in a chloroplasts is the
stroma
stoma
thylakoid
granum
chlorophyll
61. All of the following are end products of the light-dependent reactions of photosynthesis Except.
NADPH
ATP
O2 (oxygen)
H+ (protons)
C6H12O6 (glucose)
62. In C3 plants, the enzyme that incorporates CO2 into organic compounds is
helicase
PEP carboxylase
RuBP carboxylase
carboxypeptidase
pyruvate decarboxylase
63. Plants that use C4 photosynthesis utilize
rubisco.
phosphoenolpyruvate
PEP carboxylase.
bundle sheath cells.
All of the above.
64. The products of the light reactions, or photophosphorylation, in photosynthesis are
oxygen and water.
oxygen and ATP.
oxygen, ATP, and NADPH.
water, ATP, and NADPH.
water, ATP, and NADP+ + H+.
65. Which statement concerning plants that utilize C4 photosynthesis is Not true?
They open their stomata only at night.
They capture carbon dioxide with PEP carboxylase.
They are more efficient than C3 plants because they transpire less and therefore lose less water.
The use the Calvin cycle to make sugars.
They use bundle sheath cells.
66. Which of the following is a specialized feature of plants that live in hot dry regions?
Stomata that open and close
Transpiration
Photophosphorylation
C4 photosynthesis
Carbon fixation
67. The light -dependent reactions of photosynthesis occur in the
nucleus
cytoplasm
mitochondria
thylakoid membrane
stroma
68. The cyclic pathway of photosynthesis occurs because
The chloroplasts need to regenerate NAD+.
The Calvin cycle uses more ATP than NADPH.
It can occur in regions lacking light.
It is more efficient way to produce oxygen.
It is a more efficient way to produce the NADPH needed for the Calvin cycle.