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Multiple Choice Quiz
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1
Most solar radiation passes through the earth's atmosphere and reaches its surface.
A)True
B)False
2
Photosynthesis utilizes _____.
A)the entire electromagnetic spectrum
B)only visible light
C)radio and microwaves
D)gamma rays
3
Which of the following is only minimally absorbed by chlorophylls a and b?
A)violet light
B)green light
C)blue light
D)red light
4
Photosynthetic pigments capture _____ of the solar energy that reaches the earth.
A)less than 2%
B)20%
C)50%
D)100%
5
The importance of photosynthesis is that photosynthetic organisms produce ____ for the biosphere.
A)CO2
B)H2O
C)organic food
D)all of the above
6
Which of the following do NOT perform photosynthesis?
A)plants
B)animals
C)algae
7
The piece of equipment that measures how much light passes through a sample is called a _____.
A)spirometer
B)gas chromatograph
C)spectrophotometer
D)calorimeter
8
The rate of photosynthesis can be measured by measuring the production of _____.
A)CO2
B)H2O
C)O2
9
The pigments which are primarily responsible for the metabolic activity associated with photosynthesis are the _____.
A)chlorophylls
B)carotenoids
10
The plant pigments, carotenoids, absorb light in the violet-blue-green range and therefore appear shades of yellow and orange.
A)True
B)False
11
The reactants of photosynthesis include all of the following except _____.
A)solar energy
B)carbohydrates
C)H2O
D)CO2
12
Photosynthesis is an energy transformation during which all of the available solar radiation is transformed into chemical bond energy of carbohydrates.
A)True
B)False
13
The oxygen given off by photosynthesis comes from ___________.
A)CO2
B)CH2O
C)H2O
D)the atmosphere
14
In a eukaryotic cell, photosynthesis occurs in the _____.
A)chloroplast
B)mitochondria
C)nucleus
D)golgi complex
15
The photosynthetic pigments are found in the _____.
A)stroma
B)SER
C)Golgi complex
D)thylakoids
16
CO2 reduction occurs in the _____.
A)thylakoids
B)stroma
C)nucleus
D)grana
17
During photosynthesis CO2 is _____ to form carbohydrates.
A)oxidized
B)reduced
18
Chloroplasts will be found in _____. plant leaf cells
A)photosynthetic bacteria
B)animal cells
C)all of the above
19
In some places, thylakoids are stacked to form what look like piles of seeds called grana.
A)True
B)False
20
Heavy oxygen (18O) was used to show that O2 produced by photosynthesis comes from H2O.
A)True
B)False
21
The light-independent reactions of photosynthesis must take place in the dark.
A)True
B)False
22
The rate of photosynthesis is not affected by changes in temperature.
A)True
B)False
23
The energy-capturing reactions take place during the _____ reactions.
A)light-dependent
B)light-independent
24
When NADP+ accepts electrons it becomes _____.
A)CO2
B)(CH2O)
C)NADPH
D)H2O
25
The light-independent reactions take place in the ___________.
A)thylakoids
B)grana
C)mitochondria
D)stroma
26
When the thylakoid pigments absorb solar energy, low energy electrons are removed from _____.
A)(CH2O)
B)H2O
C)CO2
D)all of the above
27
Chlorophyll a and chlorophyll b absorb exactly the same range of light and appear the same color.
A)True
B)False
28
Light can be _____ by a pigment.
A)absorbed by (taken up)
B)reflected by (given off)
C)transmitted (passed through)
D)all of the above
29
The light dependent reactions cannot take place without light.
A)True
B)False
30
When electrons from chlorophyll a move down an electron transport system _____ is produced.
A)NADP+
B)H2O
C)ATP
D)carbohydrate
31
ATP production during photosynthesis is sometimes called photophosphorylation because light is involved.
A)True
B)False
32
Which of the following is true of the cyclic electron pathway?
A)ATP and NADPH are both produced.
B)this pathway probably evolved after the non-cyclic electron pathway.
C)the solar energy is absorbed by the PS I antenna complex.
D)all of the above
33
Which of the following is a product of the noncyclic electron pathway?
A)ATP
B)O2
C)NADPH
D)all of the above
34
During the noncyclic electron pathway, electrons move from water through PS II to PS I and then to _____.
A)ADP
B)CO2
C)NADP+
D)glucose
35
Which of the following is NOT a product of the light-dependent reactions?
A)ATP
B)O2
C)glucose
D)NADPH
36
When H+ flow down their electrochemical gradient through _____ ATP production occurs.
A)PS I
B)PS II
C)ATP synthase
D)the stroma
37
The light-dependent reactions take place in the _____.
A)stroma
B)thylakoids
C)cytosol
D)cristae
38
During the light-dependent reactions, H2O is _____.
A)oxidized
B)reduced
39
When ATP synthesis is tied to an electrochemical gradient it is called chemiosmosis.
A)True
B)False
40
The antennae complex is composed of _____.
A)chlorophyll a
B)chlorophyll b
C)carotenoid pigments
D)all of the above
41
Which product of the light-dependent reactions is used in the light-independent reactions?
A)O2
B)NADPH
C)ATP
D)both B and C
42
The energy and electrons needed for the reduction synthesis are supplied by _____.
A)NADPH
B)ATP
C)CO2
D)both A and B
43
A plant can use PGAL to make _____.
A)sucrose
B)oils
C)cellulose
D)all of the above
44
Compared to animal cells, plant and algal cells have more limited biochemical capabilities.
A)True
B)False
45
The first step of the Calvin cycle is
A)CO2 fixation
B)PGAL reduction
C)RuBP regeneration
D)ATP synthesis
46
The Calvin cycle is sometimes referred to as the C3 cycle because the first detectable moleculefollowing CO2 fixation is a 3-carbon molecule.
A)True
B)False
47
CO2 fixation occurs when CO2 combines with _____.
A)ribulose bisphosphate
B)gylceraldehyde -3-phosphate
C)NADP
D)glucose
48
About 20-50% of the protein content in chloroplasts is _____ which speeds up CO2 fixation.
A)glyceraldehyde-3-phosphate
B)NADPH
C)ATP
D)RuBP carboxylase
49
Which correctly describes the light independent reactions?
A)ATP is produced
B)CO2 is reduced
C)sunlight is required
D)O2 is produced
50
Five molecules of PGAL are used to produce _____ so that the Calvin cycle can continue.
A)NADPH
B)RuBP
C)glucose
D)oxaloacetate
51
The six-carbon molecule resulting from carbon-dioxide fixation immediately breaks down to form __________.
A)2, three-carbon PGA molecules
B)3, two-carbon PGA molecules
C)glucose
D)RuBP
52
In a C4 plant, the __________ cells contain chloroplasts.
A)bundle sheath
B)mesophyll
C)both A and B
53
C4 plants fix CO2 to _____.
A)PEP
B)RuBP
C)PGA
D)oxaloacetate
54
The stomates of the leaves _____.
A)close when the weather is hot and dry
B)take up CO2
C)allow H2O to leave the leaf
D)all of the above
55
The CAM light-independent reactions occur only at night so H2O can be conserved.
A)True
B)False
56
A solution to global warming is _____.
A)plant more shrubs and trees
B)use fewer fossil fuels
C)protect the rainforests
D)all of the above
57
C4 plants like corn and crabgrass grow better when conditions are hot and dry.
A)True
B)False







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