Unit 4 Review
1 Below is an absorption spectrum for an unknown pigment molecule. What color would this pigment appear to you?
A red
B blue
C green
D violet
E yellow
2 In green plants, most of the ATP for synthesis of proteins, cytoplasmic streaming, and other cellular activities comes
directly from
A photosystem I.
B the Calvin cycle.
C oxidative phosphorylation.
D cyclic photophosphorylation.
E noncyclic photophosphorylation.
3 What portion of an illuminated plant cell would you expect to have the lowest pH?
A nucleus
B vacuole
C chloroplast
D thylakoid space
E stroma of chloroplast
4 A new flower species has a unique photosynthetic pigment. The leaves of this plant appear to be reddish yellow.
What wavelengths of visible light are not being absorbed by this pigment?
A red and yellow
B blue and violet
C green and yellow
D blue, green, and red
E green, blue, and violet
5 Some photosynthetic organisms contain chloroplasts that lack photosystem II, yet are able to survive. The best way
to detect the lack of photosystem II in these organisms would be
A to test for CO2 fixation in the dark.
B to test for liberation of O2 in the light.
C to test for production of either sucrose or starch.
D to do experiments to generate an action spectrum.
E to determine if they have thylakoids in the chloroplasts.
6 Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the
stroma. This damage will have the most direct effect on which of the following processes?
A the synthesis of ATP
B the splitting of water
C the reduction of NADP+
D the absorption of light energy by chlorophyll
E the flow of electrons from photosystem II to photosystem I
7 In an experiment studying photosynthesis performed during the day, you provide a plant with radioactive carbon
(14C) dioxide as a metabolic tracer. The 14C is incorporated first into oxaloacetic acid. The plant is best characterized
as a
A C4 plant.
B C3 plant.
C CAM plant.
D heterotroph.
E chemoautotroph.
8 Which of the following processes could still occur in a chloroplast in the presence of an inhibitor that prevents H+
from passing through ATP synthase complexes?
A the Calvin cycle
B sugar synthesis
C oxidation of NADPH
D photophosphorylation
E generation of a proton-motive force
9 The diagram below represents an experiment with isolated chloroplasts. The chloroplasts were first made acidic by
soaking them in a solution at pH 4. After the thylakoid space reached pH 4, the chloroplasts were transferred to a
basic solution at pH 8. The chloroplasts are then placed in the dark. Which of these compounds would you expect to
be produced?
A ATP
B G3P
C NADPH + H+
D ATP and NADPH + H+
E ATP, NADPH + H+, and G3P
10 Identify the stroma.
A A
B B
C C
D D
E E
11 Identify a thylakoid.
A A
B B
C C
D D
E E
12 Where does the Calvin cycle occur?
A A
B B
C C
D D
E E
13 Which of these equations best summarizes photosynthesis?
A H2O -> 2 H+ + 1/2 O2 + 2eB 6 CO2 + 6 O2 -> C6H12O6 + 6 H2O
C 6 CO2 + 6 H2O -> C6H12O6 + 6 O2
D C6H12O6 + 6 O2 -> 6 CO2 + 12 H2O
E C6H12O6 + 6 O2 -> 6 CO2 + 6 H2O + Energy
14 The light reactions of photosynthesis use _____ and produce _____.
A water ... NADPH
B NADPH ... NADP+
C NADPH ... oxygen
D carbon dioxide ... sugar
E carbon dioxide ... oxygen
15 _____ releases energy that is used to pump
hydrogen ions from the stroma into the thylakoid
compartment.
A A
B B
C C
D D
E E
16 _____ splits
A
B
C
D
E
water into 1/2 O2, H+, and e-.
A
B
C
D
E
17 Energized electrons from ____ enter an electron
transport chain and are then used to reduce NADP+.
A A
B B
C C
D D
E E
18 Chlorophyll can be found in _____.
A B and D
B A and B
C A and C
D B and C
E B and E
19 Carbon fixation involves the addition of carbon dioxide to
A G3P.
B RuBP.
C 3-PGA.
D rubisco.
E NADPH.
20 After 3-PGA is phosphorylated, it is reduced by
A CO2.
B ADP.
C ATP.
D NADP+.
E NADPH.
21 How many carbon dioxide molecules must be added to RuBP to make a single molecule of glucose?
A 2
B 4
C 6
D 8
E 10
22 In the Calvin cycle, how many ATP molecules are required to regenerate RuBP from five G3P molecules?
A 1
B 2
C 3
D 4
E 5
23 In C3 plants
A
B
C
D
E
the conservation of water promotes
photosynthesis.
photorespiration.
the light reactions.
the opening of stomata.
a shift to C4 photosynthesis.
24 In C4 and CAM plants carbon dioxide is fixed in the _____ of mesophyll cells.
A grana
B stoma
C stroma
D cytoplasm
E thylakoids
25 C4 plants differ from C3 and CAM plants in that C4 plants
A open their stomata only at night.
B are better adapted to wet conditions.
C use malic acid (malate) to transfer carbon dioxide to the Calvin cycle.
D transfer fixed carbon dioxide to cells in which the Calvin cycle occurs.
E Both C and D
Question Answer Key
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Unit 4 Review
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Answer
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10/19/2010 12:41:32 PM